.NET Framework Class Library
PermissionSet..::.Demand Method

Forces a SecurityException at run time if all callers higher in the call stack have not been granted the permissions specified by the current instance.

Namespace:  System.Security
Assembly:  mscorlib (in mscorlib.dll)
Syntax

Visual Basic (Declaration)
Public Sub Demand
Visual Basic (Usage)
Dim instance As PermissionSet

instance.Demand()
C#
public void Demand()
Visual C++
public:
virtual void Demand() sealed
JScript
public final function Demand()

Implements

IStackWalk..::.Demand()()()
Exceptions

ExceptionCondition
SecurityException

A caller in the call chain does not have the permission demanded.

Remarks

Use Demand on a PermissionSet to ensure that all callers have all permissions in the set with one operation.

The permissions of the code that calls this method are not examined; the check begins from the immediate caller of that code and proceeds up the stack. The call stack is typically represented as growing down, so that methods higher in the call stack call methods lower in the call stack. Demand succeeds only if no SecurityException is thrown.

If the PermissionSet contains permissions that do not inherit from CodeAccessPermission, the Demand methods of those permissions are called as well.

Examples

The following code example shows the use of the Demand method to demand all the permissions in a permission set. This code example is part of a larger example provided for the PermissionSet class.

Visual Basic
' Demand all the permissions in the set.
Console.WriteLine("Demand all permissions.")
ps1.Demand()
C#
// Demand all the permissions in the set.
Console.WriteLine("Demand all permissions.");
ps1.Demand();
Visual C++
// Demand all the permissions in the set.
Console::WriteLine( "Demand all permissions." );
ps1->Demand();
Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Version Information

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
See Also

Reference

Other Resources

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