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ImpersonationOption Enumeration

Specifies the impersonation behavior for a service operation on a service instance.

Namespace: System.ServiceModel
Assembly: System.ServiceModel (in system.servicemodel.dll)

public enum ImpersonationOption
public enum ImpersonationOption
public enum ImpersonationOption

 Member nameDescription
AllowedImpersonation is performed if credentials are available and ImpersonateCallerForAllOperations is equal to true
NotAllowedImpersonation is not performed. If ImpersonateCallerForAllOperations is equal to true, a validation exception occurs at service startup time. 
RequiredImpersonation is required.  

Use the ImpersonationOption enumeration to control impersonation in Windows Communication Foundation (WCF) applications.

This setting interacts with a configuration property on ImpersonateCallerForAllOperations in the following table.

The following code example on the service shows how to have a method impersonate the caller by using the OperationBehaviorAttribute to set the impersonation level.

[OperationBehavior(Impersonation = ImpersonationOption.Required)]
public double Add(double n1, double n2)
{
    double result = n1 + n2;
    Console.WriteLine("Received Add({0},{1})", n1, n2);
    Console.WriteLine("Return: {0}", result);
    DisplayIdentityInformation();
    return result;
}

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0

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