UIPermission.Intersect Method (IPermission)

 

Creates and returns a permission that is the intersection of the current permission and the specified permission.

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

public override IPermission Intersect(
	IPermission target
)

Parameters

target
Type: System.Security.IPermission

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

Return Value

Type: System.Security.IPermission

A new permission that represents the intersection of the current permission and the specified permission. This new permission is null if the intersection is empty.

Exception Condition
ArgumentException

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

The intersection of two permissions is a permission that describes the set of operations they both describe in common. Specifically, it represents the least permissive values of UIPermissionWindow and UIPermissionClipboard from those in the current permission and the specified permission.

The following code example shows the behavior of the Intersect method. This example is part of a larger example provided for the UIPermission 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.

// Intersect creates and returns a new permission that is the intersection of the
// current permission and the permission specified.
private static void IntersectDemo()
{
    UIPermission uiPerm1 = new UIPermission(UIPermissionWindow.SafeTopLevelWindows, UIPermissionClipboard.OwnClipboard);
    UIPermission uiPerm2 = new UIPermission(UIPermissionWindow.SafeSubWindows, UIPermissionClipboard.NoClipboard);
    UIPermission p3 = (UIPermission)uiPerm1.Intersect(uiPerm2);

    Console.WriteLine("The intersection of " + uiPerm1.Window.ToString() + " and \n\t" +
        uiPerm2.Window.ToString() + " is " + p3.Window.ToString() + "\n");
    Console.WriteLine("The intersection of " + uiPerm1.Clipboard.ToString() + " and \n\t" +
            uiPerm2.Clipboard.ToString() + " is " + p3.Clipboard.ToString() + "\n");

}

.NET Framework
Available since 1.1
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