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Constraint.OnExecute Method

When implemented by a derived class, validates the specified object using the specified native activity and validation contexts.

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

protected abstract void OnExecute(
	NativeActivityContext context,
	Object objectToValidate,
	ValidationContext objectToValidateContext


Type: System.Activities.NativeActivityContext
The workflow activity execution.
Type: System.Object
A workflow element.
Type: System.Activities.Validation.ValidationContext
The context of the workflow element to be validated.

.NET Framework

Supported in: 4

.NET Framework Client Profile

Supported in: 4

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.