Parameters

target

A System.Security.Permissions.EnvironmentPermission instance that is to be tested for the subset relationship.

Returns

true if the current instance is a subset of target ; otherwise, false. If the current instance is unrestricted, and target is not, returns false. If target is unrestricted, returns true. If target is null and no environment variables are secured by the current instance, returns true. If target is null, and the current instance secures one or more environment variables, returns false.

Exceptions

Type	Reason
ArgumentException	target is not null and is not of type System.Security.Permissions.EnvironmentPermission .

Remarks

Note:

The current instance is a subset of target if the current instance specifies a set of accesses to resources that is wholly contained by target. For example, a permission that represents read access to a file is a subset of a permission that represents read and write access to the file.

If this method returns true , the current instance describes a level of access to a set of environment variables that is also described by target.

This method overrides System.Security.CodeAccessPermission.IsSubsetOf(System.Security.IPermission) and is implemented to support the System.Security.IPermission interface.

Requirements

Namespace: System.Security.Permissions
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0