Action<T1, T2, T3, T4, T5, T6, T7, T8, T9> Delegate

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Updated: October 2010

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

Namespace:  System
Assembly:  System.Core (in System.Core.dll)

Syntax

'Declaration
Public Delegate Sub Action(Of In T1, In T2, In T3, In T4, In T5, In T6, In T7, In T8, In T9) ( _
    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 _
)

public delegate void Action<in T1, in T2, in T3, in T4, in T5, in T6, in T7, in T8, in T9>(
    T1 arg1,
    T2 arg2,
    T3 arg3,
    T4 arg4,
    T5 arg5,
    T6 arg6,
    T7 arg7,
    T8 arg8,
    T9 arg9
)

Type Parameters

• inT1
  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 2678dc63-c7f9-4590-9ddc-0a4df684d42e.

• inT2
  The type of the second parameter of the method that this delegate encapsulates.

• inT3
  The type of the third parameter of the method that this delegate encapsulates.

• inT4
  The type of the fourth parameter of the method that this delegate encapsulates.

• inT5
  The type of the fifth parameter of the method that this delegate encapsulates.

• inT6
  The type of the sixth parameter of the method that this delegate encapsulates.

• inT7
  The type of the seventh parameter of the method that this delegate encapsulates.

• inT8
  The type of the eighth parameter of the method that this delegate encapsulates.

• inT9
  The type of the ninth parameter of the method that this delegate encapsulates.

Parameters

• arg1
  Type: T1
  The first parameter of the method that this delegate encapsulates.

• arg2
  Type: T2
  The second parameter of the method that this delegate encapsulates.

• arg3
  Type: T3
  The third parameter of the method that this delegate encapsulates.

• arg4
  Type: T4
  The fourth parameter of the method that this delegate encapsulates.

• arg5
  Type: T5
  The fifth parameter of the method that this delegate encapsulates.

• arg6
  Type: T6
  The sixth parameter of the method that this delegate encapsulates.

• arg7
  Type: T7
  The seventh parameter of the method that this delegate encapsulates.

• arg8
  Type: T8
  The eighth parameter of the method that this delegate encapsulates.

• arg9
  Type: T9
  The ninth parameter of the method that this delegate encapsulates.

Remarks

You can use the Action<T1, T2, T3, T4, T5, T6, T7, T8, T9> 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 nine 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 nine parameters and returns a value, use the generic Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, TResult> delegate instead.

You can also use the Action<T1, T2, T3, T4, T5, T6, T7, T8, T9> delegate with anonymous methods and lambda expressions.

Version Information

Silverlight

Supported in: 5, 4

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

See Also

Reference

System Namespace

Func<T1, T2, T3, T4, T5, T6, T7, T8, T9, TResult>

Change History

Date	History	Reason
October 2010	Modified Visual Basic lambda expression to use Sub keyword.	Customer feedback.