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ActivityFunc<T1, T2, TResult> Class

Defines an activity delegate with one in argument of type T and one out argument of type TResult.

    System.Activities::ActivityFunc<T1, T2, TResult>

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

generic<typename T1, typename T2, typename TResult>
public ref class ActivityFunc sealed : public ActivityDelegate

Type Parameters


The type of the first in argument of the activity delegate.


The type of the second in argument of the activity delegate.


The type of the out argument of the activity delegate.

The ActivityFunc<T1, T2, TResult> type exposes the following members.

Public methodActivityFunc<T1, T2, TResult>Creates a new instance of the ActivityFunc<T1, T2, TResult> class.

Public propertyArgument1Gets or sets the first in argument of the activity delegate.
Public propertyArgument2Gets or sets the second in argument of the activity delegate.
Public propertyDisplayNameGets or sets an optional friendly name that is used for debugging, validation, exception handling, and tracking. (Inherited from ActivityDelegate.)
Public propertyHandlerGets or sets the activity that is represented by this ActivityDelegate. (Inherited from ActivityDelegate.)
Public propertyResultGets or sets the out argument of the activity delegate.

Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Protected methodGetResultArgumentWhen implemented in a derived class, returns the DelegateOutArgument of the ActivityDelegate. (Inherited from ActivityDelegate.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodShouldSerializeDisplayNameIndicates whether the DisplayName property value should be serialized to XAML. (Inherited from ActivityDelegate.)
Public methodToStringReturns a String representation of the ActivityDelegate that contains the DisplayName. (Inherited from ActivityDelegate.)

The ActivityDelegate enables activity authors to expose callbacks with specific signatures that users of the activity can provide activity-based handlers for. ActivityFunc<T1, T2, TResult> is an ActivityDelegate that returns a value. The signature of the ActivityFunc<T1, T2, TResult> is specified as generic type arguments.

There are multiple generic versions of this type that take from 1 to 16 in arguments, plus the out argument, for the activity that is called. There are also ActivityAction types for activity delegates that do not return values.

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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