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IStackWalk.PermitOnly Method

Causes every Demand for all objects except the current one that passes through the calling code to fail, even if code higher in the call stack has been granted permission to access other resources.

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

'Declaration
Sub PermitOnly

PermitOnly is similar to Deny, in that both cause stack walks to fail when they would otherwise succeed. The difference is that Deny specifies permissions that will cause the stack walk to fail, but PermitOnly specifies the only permissions that do not cause the stack walk to fail. Call this method to ensure that your code can be used to access only the specified resources.

PermitOnly is ignored for a permission not granted because a demand for that permission will not succeed. However, if code lower on the call stack later calls Demand for that permission, a SecurityException is thrown when the stack walk reaches the code that tried to call PermitOnly. This is because the code that called PermitOnly has not been granted the permission, even though it called PermitOnly for that permission. The call stack is typically represented as growing down, so that methods higher in the call stack call methods lower in the call stack.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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