Observe your system

FCQRS reports command, event, saga, dispatch, and projection activity through ILogger and ActivitySource. Configure both before production so one correlation id can be followed across the complete workflow.

Message-flow logs

At Information level, the FCQRS.MessageFlow category records aggregate decisions, persisted event versions, saga transitions, and commands issued by sagas. Every line contains the correlation id:

info: FCQRS.MessageFlow
      Command Publish (doc-42, "guides/fcqrs") to aggregate doc-42 yielded PersistEvent (PublicationRequested ...) [cid: ...]
info: FCQRS.MessageFlow
      Aggregate doc-42 persisted event PublicationRequested (...) (v2) [cid: ...]
info: FCQRS.MessageFlow
      Saga doc-42~PublicationSaga~... changed state to ReservingSlug [cid: ...]
info: FCQRS.MessageFlow
      Saga doc-42~PublicationSaga~... sent command Reserve (...) to guides/fcqrs [cid: ...]

Disable the process-wide narrative with FCQRS.Common.Telemetry.MessageFlowLogging <- false or builder.WithMessageFlowLogging(false). Standard logger filtering also applies:

{
  "Logging": {
    "LogLevel": {
      "FCQRS.MessageFlow": "None"
    }
  }
}

When the category is disabled, FCQRS skips formatting the message payload.

Distributed traces

Aggregates, sagas, and projections use three activity sources. A W3C traceparent is copied into command metadata and carried through later events and saga commands. Register all three sources:

tracing.AddSource(FCQRS.Common.Telemetry.AllActivitySources); // "FCQRS", "FCQRS.Saga", "FCQRS.Query"

ActivitySource avoids creating activities when no listener is attached. Restart-detection aborts and fatal errors set span status to Error.

Start an activity at the application boundary before constructing the first command. The resulting trace should contain the initial command, stored event, saga states, follow-up commands, and projection handler. The CID remains a domain correlation value; trace context travels beside it in metadata.

Span names are low-cardinality

Span names contain the case name, such as Command:Register, Event:Registered, Saga:GeneratingCode, or Abort:VerificationRequested. Payload values do not appear in the span name, so trace backends can group operations without creating one name per entity. On .NET 11, tracing rules can select a source and operation:

builder.Services.AddTracing(tracing =>
{
    tracing.EnableTracing(sourceName: "FCQRS.Saga");
    tracing.DisableTracing(sourceName: "FCQRS", operationName: "Command:HealthPing");
});

Payload detail may still appear in tags and logs as described below.

Keep payloads out of diagnostics

Rendered payloads appear in span tags and message-flow logs by default. Disable them before processing sensitive values when detailed payload diagnostics are not acceptable:

FCQRS.Common.Telemetry.IncludePayloads <- false   // or builder.WithPayloadDiagnostics(false)

builder.WithPayloadDiagnostics(false);

Tags and log lines then contain the case name only. This switch affects diagnostics, not persisted events. A secret stored in an event remains in the journal regardless of the diagnostics setting.

Flush telemetry on a fatal exit

FCQRS terminates the process when a fold, aggregate handler, saga handler, effect runner, or projection handler fails in a way that could leave state processing inconsistent. Fail-fast skips normal finalizer and process-exit flushing. Register a bounded flush hook for buffered telemetry:

FCQRS.Common.Telemetry.FatalFlush <- System.Action(fun () ->
    tracerProvider.ForceFlush(3000) |> ignore
    loggerProvider.ForceFlush(3000) |> ignore) // or Serilog's Log.CloseAndFlush()

FCQRS.Common.Telemetry.FatalFlush = new Action(() =>
{
    tracerProvider.ForceFlush(3000);
    loggerProvider.ForceFlush(3000); // or Serilog.Log.CloseAndFlush()
});

The hook runs on a background thread with a five-second cap.

Alerts to add

At minimum, alert on:

process fail-fast and repeated restarts;
projection handler failure and growing projection lag;
a saga remaining in one state beyond its domain timeout;
unreachable cluster members and shard movement that does not settle;
journal or snapshot storage latency and errors;
exhausted retries or workflows sent to manual intervention.

FCQRS supplies the message and trace context. Domain timeouts, projection-lag metrics, and manual-intervention counters belong to the application because only it knows the expected duration and business impact.

Akka's own logging

Akka.NET internal logging defaults to OFF; FCQRS logs still use the application's ILoggerFactory. Enable Akka.NET internals with builder.WithAkkaLogging(AkkaLogLevel.Info) from the hosting builder, or set config:akka:loglevel in configuration. See Configuration for the config-key details.

namespace System

Multiple items
type Action<'T1,'T2,'T3,'T4,'T5,'T6,'T7,'T8,'T9,'T10,'T11,'T12,'T13,'T14,'T15,'T16> = new: object: obj * method: nativeint -> unit member BeginInvoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 * arg8: 'T8 * arg9: 'T9 * arg10: 'T10 * arg11: 'T11 * arg12: 'T12 * arg13: 'T13 * arg14: 'T14 * arg15: 'T15 * arg16: 'T16 * callback: AsyncCallback * object: obj -> IAsyncResult member EndInvoke: result: IAsyncResult -> unit member Invoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 * arg8: 'T8 * arg9: 'T9 * arg10: 'T10 * arg11: 'T11 * arg12: 'T12 * arg13: 'T13 * arg14: 'T14 * arg15: 'T15 * arg16: 'T16 -> unit
<summary>Encapsulates a method that has 16 parameters and does not return a value.</summary>
<param name="arg1">The first parameter of the method that this delegate encapsulates.</param>
<param name="arg2">The second parameter of the method that this delegate encapsulates.</param>
<param name="arg3">The third parameter of the method that this delegate encapsulates.</param>
<param name="arg4">The fourth parameter of the method that this delegate encapsulates.</param>
<param name="arg5">The fifth parameter of the method that this delegate encapsulates.</param>
<param name="arg6">The sixth parameter of the method that this delegate encapsulates.</param>
<param name="arg7">The seventh parameter of the method that this delegate encapsulates.</param>
<param name="arg8">The eighth parameter of the method that this delegate encapsulates.</param>
<param name="arg9">The ninth parameter of the method that this delegate encapsulates.</param>
<param name="arg10">The tenth parameter of the method that this delegate encapsulates.</param>
<param name="arg11">The eleventh parameter of the method that this delegate encapsulates.</param>
<param name="arg12">The twelfth parameter of the method that this delegate encapsulates.</param>
<param name="arg13">The thirteenth parameter of the method that this delegate encapsulates.</param>
<param name="arg14">The fourteenth parameter of the method that this delegate encapsulates.</param>
<param name="arg15">The fifteenth parameter of the method that this delegate encapsulates.</param>
<param name="arg16">The sixteenth parameter of the method that this delegate encapsulates.</param>
<typeparam name="T1">The type of the first parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T2">The type of the second parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T3">The type of the third parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T4">The type of the fourth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T5">The type of the fifth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T6">The type of the sixth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T7">The type of the seventh parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T8">The type of the eighth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T9">The type of the ninth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T10">The type of the tenth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T11">The type of the eleventh parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T12">The type of the twelfth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T13">The type of the thirteenth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T14">The type of the fourteenth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T15">The type of the fifteenth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T16">The type of the sixteenth parameter of the method that this delegate encapsulates.</typeparam>

--------------------
type Action<'T1,'T2,'T3,'T4,'T5,'T6,'T7,'T8,'T9,'T10,'T11,'T12,'T13,'T14,'T15> = new: object: obj * method: nativeint -> unit member BeginInvoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 * arg8: 'T8 * arg9: 'T9 * arg10: 'T10 * arg11: 'T11 * arg12: 'T12 * arg13: 'T13 * arg14: 'T14 * arg15: 'T15 * callback: AsyncCallback * object: obj -> IAsyncResult member EndInvoke: result: IAsyncResult -> unit member Invoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 * arg8: 'T8 * arg9: 'T9 * arg10: 'T10 * arg11: 'T11 * arg12: 'T12 * arg13: 'T13 * arg14: 'T14 * arg15: 'T15 -> unit
<summary>Encapsulates a method that has 15 parameters and does not return a value.</summary>
<param name="arg1">The first parameter of the method that this delegate encapsulates.</param>
<param name="arg2">The second parameter of the method that this delegate encapsulates.</param>
<param name="arg3">The third parameter of the method that this delegate encapsulates.</param>
<param name="arg4">The fourth parameter of the method that this delegate encapsulates.</param>
<param name="arg5">The fifth parameter of the method that this delegate encapsulates.</param>
<param name="arg6">The sixth parameter of the method that this delegate encapsulates.</param>
<param name="arg7">The seventh parameter of the method that this delegate encapsulates.</param>
<param name="arg8">The eighth parameter of the method that this delegate encapsulates.</param>
<param name="arg9">The ninth parameter of the method that this delegate encapsulates.</param>
<param name="arg10">The tenth parameter of the method that this delegate encapsulates.</param>
<param name="arg11">The eleventh parameter of the method that this delegate encapsulates.</param>
<param name="arg12">The twelfth parameter of the method that this delegate encapsulates.</param>
<param name="arg13">The thirteenth parameter of the method that this delegate encapsulates.</param>
<param name="arg14">The fourteenth parameter of the method that this delegate encapsulates.</param>
<param name="arg15">The fifteenth parameter of the method that this delegate encapsulates.</param>
<typeparam name="T1">The type of the first parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T2">The type of the second parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T3">The type of the third parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T4">The type of the fourth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T5">The type of the fifth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T6">The type of the sixth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T7">The type of the seventh parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T8">The type of the eighth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T9">The type of the ninth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T10">The type of the tenth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T11">The type of the eleventh parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T12">The type of the twelfth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T13">The type of the thirteenth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T14">The type of the fourteenth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T15">The type of the fifteenth parameter of the method that this delegate encapsulates.</typeparam>

--------------------
type Action<'T1,'T2,'T3,'T4,'T5,'T6,'T7,'T8,'T9,'T10,'T11,'T12,'T13,'T14> = new: object: obj * method: nativeint -> unit member BeginInvoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 * arg8: 'T8 * arg9: 'T9 * arg10: 'T10 * arg11: 'T11 * arg12: 'T12 * arg13: 'T13 * arg14: 'T14 * callback: AsyncCallback * object: obj -> IAsyncResult member EndInvoke: result: IAsyncResult -> unit member Invoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 * arg8: 'T8 * arg9: 'T9 * arg10: 'T10 * arg11: 'T11 * arg12: 'T12 * arg13: 'T13 * arg14: 'T14 -> unit
<summary>Encapsulates a method that has 14 parameters and does not return a value.</summary>
<param name="arg1">The first parameter of the method that this delegate encapsulates.</param>
<param name="arg2">The second parameter of the method that this delegate encapsulates.</param>
<param name="arg3">The third parameter of the method that this delegate encapsulates.</param>
<param name="arg4">The fourth parameter of the method that this delegate encapsulates.</param>
<param name="arg5">The fifth parameter of the method that this delegate encapsulates.</param>
<param name="arg6">The sixth parameter of the method that this delegate encapsulates.</param>
<param name="arg7">The seventh parameter of the method that this delegate encapsulates.</param>
<param name="arg8">The eighth parameter of the method that this delegate encapsulates.</param>
<param name="arg9">The ninth parameter of the method that this delegate encapsulates.</param>
<param name="arg10">The tenth parameter of the method that this delegate encapsulates.</param>
<param name="arg11">The eleventh parameter of the method that this delegate encapsulates.</param>
<param name="arg12">The twelfth parameter of the method that this delegate encapsulates.</param>
<param name="arg13">The thirteenth parameter of the method that this delegate encapsulates.</param>
<param name="arg14">The fourteenth parameter of the method that this delegate encapsulates.</param>
<typeparam name="T1">The type of the first parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T2">The type of the second parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T3">The type of the third parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T4">The type of the fourth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T5">The type of the fifth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T6">The type of the sixth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T7">The type of the seventh parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T8">The type of the eighth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T9">The type of the ninth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T10">The type of the tenth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T11">The type of the eleventh parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T12">The type of the twelfth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T13">The type of the thirteenth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T14">The type of the fourteenth parameter of the method that this delegate encapsulates.</typeparam>

--------------------
type Action<'T1,'T2,'T3,'T4,'T5,'T6,'T7,'T8,'T9,'T10,'T11,'T12,'T13> = new: object: obj * method: nativeint -> unit member BeginInvoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 * arg8: 'T8 * arg9: 'T9 * arg10: 'T10 * arg11: 'T11 * arg12: 'T12 * arg13: 'T13 * callback: AsyncCallback * object: obj -> IAsyncResult member EndInvoke: result: IAsyncResult -> unit member Invoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 * arg8: 'T8 * arg9: 'T9 * arg10: 'T10 * arg11: 'T11 * arg12: 'T12 * arg13: 'T13 -> unit
<summary>Encapsulates a method that has 13 parameters and does not return a value.</summary>
<param name="arg1">The first parameter of the method that this delegate encapsulates.</param>
<param name="arg2">The second parameter of the method that this delegate encapsulates.</param>
<param name="arg3">The third parameter of the method that this delegate encapsulates.</param>
<param name="arg4">The fourth parameter of the method that this delegate encapsulates.</param>
<param name="arg5">The fifth parameter of the method that this delegate encapsulates.</param>
<param name="arg6">The sixth parameter of the method that this delegate encapsulates.</param>
<param name="arg7">The seventh parameter of the method that this delegate encapsulates.</param>
<param name="arg8">The eighth parameter of the method that this delegate encapsulates.</param>
<param name="arg9">The ninth parameter of the method that this delegate encapsulates.</param>
<param name="arg10">The tenth parameter of the method that this delegate encapsulates.</param>
<param name="arg11">The eleventh parameter of the method that this delegate encapsulates.</param>
<param name="arg12">The twelfth parameter of the method that this delegate encapsulates.</param>
<param name="arg13">The thirteenth parameter of the method that this delegate encapsulates.</param>
<typeparam name="T1">The type of the first parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T2">The type of the second parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T3">The type of the third parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T4">The type of the fourth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T5">The type of the fifth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T6">The type of the sixth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T7">The type of the seventh parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T8">The type of the eighth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T9">The type of the ninth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T10">The type of the tenth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T11">The type of the eleventh parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T12">The type of the twelfth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T13">The type of the thirteenth parameter of the method that this delegate encapsulates.</typeparam>

--------------------
type Action<'T1,'T2,'T3,'T4,'T5,'T6,'T7,'T8,'T9,'T10,'T11,'T12> = new: object: obj * method: nativeint -> unit member BeginInvoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 * arg8: 'T8 * arg9: 'T9 * arg10: 'T10 * arg11: 'T11 * arg12: 'T12 * callback: AsyncCallback * object: obj -> IAsyncResult member EndInvoke: result: IAsyncResult -> unit member Invoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 * arg8: 'T8 * arg9: 'T9 * arg10: 'T10 * arg11: 'T11 * arg12: 'T12 -> unit
<summary>Encapsulates a method that has 12 parameters and does not return a value.</summary>
<param name="arg1">The first parameter of the method that this delegate encapsulates.</param>
<param name="arg2">The second parameter of the method that this delegate encapsulates.</param>
<param name="arg3">The third parameter of the method that this delegate encapsulates.</param>
<param name="arg4">The fourth parameter of the method that this delegate encapsulates.</param>
<param name="arg5">The fifth parameter of the method that this delegate encapsulates.</param>
<param name="arg6">The sixth parameter of the method that this delegate encapsulates.</param>
<param name="arg7">The seventh parameter of the method that this delegate encapsulates.</param>
<param name="arg8">The eighth parameter of the method that this delegate encapsulates.</param>
<param name="arg9">The ninth parameter of the method that this delegate encapsulates.</param>
<param name="arg10">The tenth parameter of the method that this delegate encapsulates.</param>
<param name="arg11">The eleventh parameter of the method that this delegate encapsulates.</param>
<param name="arg12">The twelfth parameter of the method that this delegate encapsulates.</param>
<typeparam name="T1">The type of the first parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T2">The type of the second parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T3">The type of the third parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T4">The type of the fourth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T5">The type of the fifth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T6">The type of the sixth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T7">The type of the seventh parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T8">The type of the eighth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T9">The type of the ninth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T10">The type of the tenth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T11">The type of the eleventh parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T12">The type of the twelfth parameter of the method that this delegate encapsulates.</typeparam>

--------------------
type Action<'T1,'T2,'T3,'T4,'T5,'T6,'T7,'T8,'T9,'T10,'T11> = new: object: obj * method: nativeint -> unit member BeginInvoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 * arg8: 'T8 * arg9: 'T9 * arg10: 'T10 * arg11: 'T11 * callback: AsyncCallback * object: obj -> IAsyncResult member EndInvoke: result: IAsyncResult -> unit member Invoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 * arg8: 'T8 * arg9: 'T9 * arg10: 'T10 * arg11: 'T11 -> unit
<summary>Encapsulates a method that has 11 parameters and does not return a value.</summary>
<param name="arg1">The first parameter of the method that this delegate encapsulates.</param>
<param name="arg2">The second parameter of the method that this delegate encapsulates.</param>
<param name="arg3">The third parameter of the method that this delegate encapsulates.</param>
<param name="arg4">The fourth parameter of the method that this delegate encapsulates.</param>
<param name="arg5">The fifth parameter of the method that this delegate encapsulates.</param>
<param name="arg6">The sixth parameter of the method that this delegate encapsulates.</param>
<param name="arg7">The seventh parameter of the method that this delegate encapsulates.</param>
<param name="arg8">The eighth parameter of the method that this delegate encapsulates.</param>
<param name="arg9">The ninth parameter of the method that this delegate encapsulates.</param>
<param name="arg10">The tenth parameter of the method that this delegate encapsulates.</param>
<param name="arg11">The eleventh parameter of the method that this delegate encapsulates.</param>
<typeparam name="T1">The type of the first parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T2">The type of the second parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T3">The type of the third parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T4">The type of the fourth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T5">The type of the fifth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T6">The type of the sixth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T7">The type of the seventh parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T8">The type of the eighth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T9">The type of the ninth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T10">The type of the tenth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T11">The type of the eleventh parameter of the method that this delegate encapsulates.</typeparam>

--------------------
type Action<'T1,'T2,'T3,'T4,'T5,'T6,'T7,'T8,'T9,'T10> = new: object: obj * method: nativeint -> unit member BeginInvoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 * arg8: 'T8 * arg9: 'T9 * arg10: 'T10 * callback: AsyncCallback * object: obj -> IAsyncResult member EndInvoke: result: IAsyncResult -> unit member Invoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 * arg8: 'T8 * arg9: 'T9 * arg10: 'T10 -> unit
<summary>Encapsulates a method that has 10 parameters and does not return a value.</summary>
<param name="arg1">The first parameter of the method that this delegate encapsulates.</param>
<param name="arg2">The second parameter of the method that this delegate encapsulates.</param>
<param name="arg3">The third parameter of the method that this delegate encapsulates.</param>
<param name="arg4">The fourth parameter of the method that this delegate encapsulates.</param>
<param name="arg5">The fifth parameter of the method that this delegate encapsulates.</param>
<param name="arg6">The sixth parameter of the method that this delegate encapsulates.</param>
<param name="arg7">The seventh parameter of the method that this delegate encapsulates.</param>
<param name="arg8">The eighth parameter of the method that this delegate encapsulates.</param>
<param name="arg9">The ninth parameter of the method that this delegate encapsulates.</param>
<param name="arg10">The tenth parameter of the method that this delegate encapsulates.</param>
<typeparam name="T1">The type of the first parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T2">The type of the second parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T3">The type of the third parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T4">The type of the fourth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T5">The type of the fifth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T6">The type of the sixth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T7">The type of the seventh parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T8">The type of the eighth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T9">The type of the ninth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T10">The type of the tenth parameter of the method that this delegate encapsulates.</typeparam>

--------------------
type Action<'T1,'T2,'T3,'T4,'T5,'T6,'T7,'T8,'T9> = new: object: obj * method: nativeint -> unit member BeginInvoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 * arg8: 'T8 * arg9: 'T9 * callback: AsyncCallback * object: obj -> IAsyncResult member EndInvoke: result: IAsyncResult -> unit member Invoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 * arg8: 'T8 * arg9: 'T9 -> unit
<summary>Encapsulates a method that has nine parameters and does not return a value.</summary>
<param name="arg1">The first parameter of the method that this delegate encapsulates.</param>
<param name="arg2">The second parameter of the method that this delegate encapsulates.</param>
<param name="arg3">The third parameter of the method that this delegate encapsulates.</param>
<param name="arg4">The fourth parameter of the method that this delegate encapsulates.</param>
<param name="arg5">The fifth parameter of the method that this delegate encapsulates.</param>
<param name="arg6">The sixth parameter of the method that this delegate encapsulates.</param>
<param name="arg7">The seventh parameter of the method that this delegate encapsulates.</param>
<param name="arg8">The eighth parameter of the method that this delegate encapsulates.</param>
<param name="arg9">The ninth parameter of the method that this delegate encapsulates.</param>
<typeparam name="T1">The type of the first parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T2">The type of the second parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T3">The type of the third parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T4">The type of the fourth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T5">The type of the fifth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T6">The type of the sixth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T7">The type of the seventh parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T8">The type of the eighth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T9">The type of the ninth parameter of the method that this delegate encapsulates.</typeparam>

--------------------
type Action<'T1,'T2,'T3,'T4,'T5,'T6,'T7,'T8> = new: object: obj * method: nativeint -> unit member BeginInvoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 * arg8: 'T8 * callback: AsyncCallback * object: obj -> IAsyncResult member EndInvoke: result: IAsyncResult -> unit member Invoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 * arg8: 'T8 -> unit
<summary>Encapsulates a method that has eight parameters and does not return a value.</summary>
<param name="arg1">The first parameter of the method that this delegate encapsulates.</param>
<param name="arg2">The second parameter of the method that this delegate encapsulates.</param>
<param name="arg3">The third parameter of the method that this delegate encapsulates.</param>
<param name="arg4">The fourth parameter of the method that this delegate encapsulates.</param>
<param name="arg5">The fifth parameter of the method that this delegate encapsulates.</param>
<param name="arg6">The sixth parameter of the method that this delegate encapsulates.</param>
<param name="arg7">The seventh parameter of the method that this delegate encapsulates.</param>
<param name="arg8">The eighth parameter of the method that this delegate encapsulates.</param>
<typeparam name="T1">The type of the first parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T2">The type of the second parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T3">The type of the third parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T4">The type of the fourth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T5">The type of the fifth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T6">The type of the sixth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T7">The type of the seventh parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T8">The type of the eighth parameter of the method that this delegate encapsulates.</typeparam>

--------------------
type Action<'T1,'T2,'T3,'T4,'T5,'T6,'T7> = new: object: obj * method: nativeint -> unit member BeginInvoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 * callback: AsyncCallback * object: obj -> IAsyncResult member EndInvoke: result: IAsyncResult -> unit member Invoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * arg7: 'T7 -> unit
<summary>Encapsulates a method that has seven parameters and does not return a value.</summary>
<param name="arg1">The first parameter of the method that this delegate encapsulates.</param>
<param name="arg2">The second parameter of the method that this delegate encapsulates.</param>
<param name="arg3">The third parameter of the method that this delegate encapsulates.</param>
<param name="arg4">The fourth parameter of the method that this delegate encapsulates.</param>
<param name="arg5">The fifth parameter of the method that this delegate encapsulates.</param>
<param name="arg6">The sixth parameter of the method that this delegate encapsulates.</param>
<param name="arg7">The seventh parameter of the method that this delegate encapsulates.</param>
<typeparam name="T1">The type of the first parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T2">The type of the second parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T3">The type of the third parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T4">The type of the fourth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T5">The type of the fifth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T6">The type of the sixth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T7">The type of the seventh parameter of the method that this delegate encapsulates.</typeparam>

--------------------
type Action<'T1,'T2,'T3,'T4,'T5,'T6> = new: object: obj * method: nativeint -> unit member BeginInvoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 * callback: AsyncCallback * object: obj -> IAsyncResult member EndInvoke: result: IAsyncResult -> unit member Invoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * arg6: 'T6 -> unit
<summary>Encapsulates a method that has six parameters and does not return a value.</summary>
<param name="arg1">The first parameter of the method that this delegate encapsulates.</param>
<param name="arg2">The second parameter of the method that this delegate encapsulates.</param>
<param name="arg3">The third parameter of the method that this delegate encapsulates.</param>
<param name="arg4">The fourth parameter of the method that this delegate encapsulates.</param>
<param name="arg5">The fifth parameter of the method that this delegate encapsulates.</param>
<param name="arg6">The sixth parameter of the method that this delegate encapsulates.</param>
<typeparam name="T1">The type of the first parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T2">The type of the second parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T3">The type of the third parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T4">The type of the fourth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T5">The type of the fifth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T6">The type of the sixth parameter of the method that this delegate encapsulates.</typeparam>

--------------------
type Action<'T1,'T2,'T3,'T4,'T5> = new: object: obj * method: nativeint -> unit member BeginInvoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 * callback: AsyncCallback * object: obj -> IAsyncResult member EndInvoke: result: IAsyncResult -> unit member Invoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * arg5: 'T5 -> unit
<summary>Encapsulates a method that has five parameters and does not return a value.</summary>
<param name="arg1">The first parameter of the method that this delegate encapsulates.</param>
<param name="arg2">The second parameter of the method that this delegate encapsulates.</param>
<param name="arg3">The third parameter of the method that this delegate encapsulates.</param>
<param name="arg4">The fourth parameter of the method that this delegate encapsulates.</param>
<param name="arg5">The fifth parameter of the method that this delegate encapsulates.</param>
<typeparam name="T1">The type of the first parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T2">The type of the second parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T3">The type of the third parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T4">The type of the fourth parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T5">The type of the fifth parameter of the method that this delegate encapsulates.</typeparam>

--------------------
type Action<'T1,'T2,'T3,'T4> = new: object: obj * method: nativeint -> unit member BeginInvoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 * callback: AsyncCallback * object: obj -> IAsyncResult member EndInvoke: result: IAsyncResult -> unit member Invoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * arg4: 'T4 -> unit
<summary>Encapsulates a method that has four parameters and does not return a value.</summary>
<param name="arg1">The first parameter of the method that this delegate encapsulates.</param>
<param name="arg2">The second parameter of the method that this delegate encapsulates.</param>
<param name="arg3">The third parameter of the method that this delegate encapsulates.</param>
<param name="arg4">The fourth parameter of the method that this delegate encapsulates.</param>
<typeparam name="T1">The type of the first parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T2">The type of the second parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T3">The type of the third parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T4">The type of the fourth parameter of the method that this delegate encapsulates.</typeparam>

--------------------
type Action<'T1,'T2,'T3> = new: object: obj * method: nativeint -> unit member BeginInvoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 * callback: AsyncCallback * object: obj -> IAsyncResult member EndInvoke: result: IAsyncResult -> unit member Invoke: arg1: 'T1 * arg2: 'T2 * arg3: 'T3 -> unit
<summary>Encapsulates a method that has three parameters and does not return a value.</summary>
<param name="arg1">The first parameter of the method that this delegate encapsulates.</param>
<param name="arg2">The second parameter of the method that this delegate encapsulates.</param>
<param name="arg3">The third parameter of the method that this delegate encapsulates.</param>
<typeparam name="T1">The type of the first parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T2">The type of the second parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T3">The type of the third parameter of the method that this delegate encapsulates.</typeparam>

--------------------
type Action<'T1,'T2> = new: object: obj * method: nativeint -> unit member BeginInvoke: arg1: 'T1 * arg2: 'T2 * callback: AsyncCallback * object: obj -> IAsyncResult member EndInvoke: result: IAsyncResult -> unit member Invoke: arg1: 'T1 * arg2: 'T2 -> unit
<summary>Encapsulates a method that has two parameters and does not return a value.</summary>
<param name="arg1">The first parameter of the method that this delegate encapsulates.</param>
<param name="arg2">The second parameter of the method that this delegate encapsulates.</param>
<typeparam name="T1">The type of the first parameter of the method that this delegate encapsulates.</typeparam>
<typeparam name="T2">The type of the second parameter of the method that this delegate encapsulates.</typeparam>

--------------------
type Action<'T> = new: object: obj * method: nativeint -> unit member BeginInvoke: obj: 'T * callback: AsyncCallback * object: obj -> IAsyncResult member EndInvoke: result: IAsyncResult -> unit member Invoke: obj: 'T -> unit
<summary>Encapsulates a method that has a single parameter and does not return a value.</summary>
<param name="obj">The parameter of the method that this delegate encapsulates.</param>
<typeparam name="T">The type of the parameter of the method that this delegate encapsulates.</typeparam>

--------------------
type Action = new: object: obj * method: nativeint -> unit member BeginInvoke: callback: AsyncCallback * object: obj -> IAsyncResult member EndInvoke: result: IAsyncResult -> unit member Invoke: unit -> unit
<summary>Encapsulates a method that has no parameters and does not return a value.</summary>

val ignore: value: 'T -> unit