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Expression.GetActionType Method

Creates a Type object that represents a generic System.Action delegate type that has specific type arguments.

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

public static Type GetActionType(
	params Type[] typeArgs


Type: System.Type[]
An array of up to sixteen Type objects that specify the type arguments for the System.Action delegate type.

Return Value

Type: System.Type
The type of a System.Action delegate that has the specified type arguments.


typeArgs contains more than sixteen elements.


typeArgs is null.

As an example, if the elements of typeArgs represent the types T1…Tn, the resulting Type object represents the constructed delegate type System.Action<T1,…,Tn> in C# or System.Action(Of T1,…,Tn) in Visual Basic.

.NET Framework

Supported in: 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.