Action Delegate

Definition

Namespace:: System

Assemblies:: System.Core.dll, System.Runtime.dll

Assemblies:: netstandard.dll, System.Runtime.dll

Assembly:: System.Runtime.dll

Assembly:: System.Core.dll

Assembly:: netstandard.dll

Source:: Action.cs

Source:: Action.cs

Source:: FormatException.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Encapsulates a method that has 15 parameters and does not return a value.

generic 
public delegate void Action(T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8, T9 arg9, T10 arg10, T11 arg11, T12 arg12, T13 arg13, T14 arg14, T15 arg15);

public delegate void Action(T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8, T9 arg9, T10 arg10, T11 arg11, T12 arg12, T13 arg13, T14 arg14, T15 arg15);

public delegate void Action(T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8, T9 arg9, T10 arg10, T11 arg11, T12 arg12, T13 arg13, T14 arg14, T15 arg15) where T1 : allows ref struct where T2 : allows ref struct where T3 : allows ref struct where T4 : allows ref struct where T5 : allows ref struct where T6 : allows ref struct where T7 : allows ref struct where T8 : allows ref struct where T9 : allows ref struct where T10 : allows ref struct where T11 : allows ref struct where T12 : allows ref struct where T13 : allows ref struct where T14 : allows ref struct where T15 : allows ref struct;

type Action<'T1, 'T2, 'T3, 'T4, 'T5, 'T6, 'T7, 'T8, 'T9, 'T10, 'T11, 'T12, 'T13, 'T14, 'T15> = delegate of 'T1 * 'T2 * 'T3 * 'T4 * 'T5 * 'T6 * 'T7 * 'T8 * 'T9 * 'T10 * 'T11 * 'T12 * 'T13 * 'T14 * 'T15 -> unit

Public Delegate Sub Action(Of In T1, In T2, In T3, In T4, In T5, In T6, In T7, In T8, In T9, In T10, In T11, In T12, In T13, In T14, In T15)(arg1 As T1, arg2 As T2, arg3 As T3, arg4 As T4, arg5 As T5, arg6 As T6, arg7 As T7, arg8 As T8, arg9 As T9, arg10 As T10, arg11 As T11, arg12 As T12, arg13 As T13, arg14 As T14, arg15 As T15)

Type Parameters

T1

The type of the first parameter of the method that this delegate encapsulates.

This type parameter is contravariant. That is, you can use either the type you specified or any type that is less derived. For more information about covariance and contravariance, see Covariance and Contravariance in Generics.

T2

The type of the second parameter of the method that this delegate encapsulates.

T3

The type of the third parameter of the method that this delegate encapsulates.

T4

The type of the fourth parameter of the method that this delegate encapsulates.

T5

The type of the fifth parameter of the method that this delegate encapsulates.

T6

The type of the sixth parameter of the method that this delegate encapsulates.

T7

The type of the seventh parameter of the method that this delegate encapsulates.

T8

The type of the eighth parameter of the method that this delegate encapsulates.

T9

The type of the ninth parameter of the method that this delegate encapsulates.

T10

The type of the tenth parameter of the method that this delegate encapsulates.

T11

The type of the eleventh parameter of the method that this delegate encapsulates.

T12

The type of the twelfth parameter of the method that this delegate encapsulates.

T13

The type of the thirteenth parameter of the method that this delegate encapsulates.

T14

The type of the fourteenth parameter of the method that this delegate encapsulates.

T15

The type of the fifteenth parameter of the method that this delegate encapsulates.

Parameters

arg1: T1

The first parameter of the method that this delegate encapsulates.

arg2: T2

The second parameter of the method that this delegate encapsulates.

arg3: T3

The third parameter of the method that this delegate encapsulates.

arg4: T4

The fourth parameter of the method that this delegate encapsulates.

arg5: T5

The fifth parameter of the method that this delegate encapsulates.

arg6: T6

The sixth parameter of the method that this delegate encapsulates.

arg7: T7

The seventh parameter of the method that this delegate encapsulates.

arg8: T8

The eighth parameter of the method that this delegate encapsulates.

arg9: T9

The ninth parameter of the method that this delegate encapsulates.

arg10: T10

The tenth parameter of the method that this delegate encapsulates.

arg11: T11

The eleventh parameter of the method that this delegate encapsulates.

arg12: T12

The twelfth parameter of the method that this delegate encapsulates.

arg13: T13

The thirteenth parameter of the method that this delegate encapsulates.

arg14: T14

The fourteenth parameter of the method that this delegate encapsulates.

arg15: T15

The fifteenth parameter of the method that this delegate encapsulates.

Remarks

You can use the Action delegate to pass a method as a parameter without explicitly declaring a custom delegate. The encapsulated method must correspond to the method signature that is defined by this delegate. This means that the encapsulated method must have 15 parameters that are all passed to it by value, and it must not return a value. (In C#, the method must return void. In Visual Basic, it must be defined by the Sub…End Sub construct. It can also be a method that returns a value that is ignored.) Typically, such a method is used to perform an operation.

Note

To reference a method that has 15 parameters and returns a value, use the generic Func delegate instead.

You can also use the Action delegate with anonymous methods and lambda expressions.

Extension Methods

Name	Description
GetMethodInfo(Delegate)	Gets an object that represents the method represented by the specified delegate.

Applies to

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