Union Method
Collapse the table of content
Expand the table of content

ReflectionPermission.Union Method (IPermission)

 

Creates a permission that is the union of the current permission and the specified permission.

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

public override IPermission Union(
	IPermission other
)

Parameters

other
Type: System.Security.IPermission

A permission to combine with the current permission. It must be of the same type as the current permission.

Return Value

Type: System.Security.IPermission

A new permission that represents the union of the current permission and the specified permission.

Exception Condition
ArgumentException

The other parameter is not null and is not of the same type as the current permission.

The result of a call to Union is a permission that represents all the operations represented by both the current permission and the specified permission. Any demand that passes either permission passes their union.

The following code example shows the behavior of the Union method. This example is part of a larger example provided for the ReflectionPermission class.

System_CAPS_noteNote

The code example is intended to show the behavior of the method, not to demonstrate its use. In general, the methods of permission classes are used by the security infrastructure; they are not typically used in applications.

private static void UnionDemo()
{
    ReflectionPermission memberAccessPerm = new ReflectionPermission(ReflectionPermissionFlag.MemberAccess);
    ReflectionPermission restrictedMemberAccessPerm = new ReflectionPermission(ReflectionPermissionFlag.RestrictedMemberAccess);
    ReflectionPermission reflectionPerm3 = (ReflectionPermission)memberAccessPerm.Union(restrictedMemberAccessPerm);
    if (reflectionPerm3 == null)
    {
        Console.WriteLine("The union of " + memberAccessPerm.Flags + " and " +
            restrictedMemberAccessPerm.Flags + " is null.");
    }
    else
    {
        Console.WriteLine("The union of " + memberAccessPerm.Flags + " and " +
            restrictedMemberAccessPerm.Flags + " = " +
            ((ReflectionPermission)reflectionPerm3).Flags.ToString());
    }

}

.NET Framework
Available since 1.1
Return to top
Show:
© 2016 Microsoft