System.Security.Permissions.FileIOPermission.Intersect C# (CSharp) Method

        public override IPermission Intersect(IPermission target) { return default(IPermission); }
        public override bool IsSubsetOf(IPermission target) { return false; }

		public void Intersect ()
		{
			p = new FileIOPermission(FileIOPermissionAccess.Read, pathArrayGood);
			p.AllFiles = FileIOPermissionAccess.Append;
			p.AllLocalFiles = FileIOPermissionAccess.Write;
			
			unrestricted = new FileIOPermission(PermissionState.Unrestricted);
			
			FileIOPermission intersection = (FileIOPermission)p.Intersect(unrestricted);
			pathsInPermission = intersection.GetPathList(FileIOPermissionAccess.Read);
			Assert.IsTrue (pathsInPermission.Length == 2, "Should contain correct number of Read paths. Expected 2 but got: "+pathsInPermission.Length);
			Assert.IsTrue((intersection.AllFiles & FileIOPermissionAccess.Append) != 0, "Should have Append bit in AllFiles.");
			Assert.IsTrue((intersection.AllLocalFiles & FileIOPermissionAccess.Write) != 0, "Should have Write bit in AllLocalFiles.");

			intersection = (FileIOPermission)unrestricted.Intersect(p);
			pathsInPermission = intersection.GetPathList(FileIOPermissionAccess.Read);
			Assert.IsTrue (pathsInPermission.Length == 2, "Should contain correct number of Read paths. Expected 2 but got: "+pathsInPermission.Length);
			Assert.IsTrue((intersection.AllFiles & FileIOPermissionAccess.Append) != 0, "Should have Append bit in AllFiles.");
			Assert.IsTrue((intersection.AllLocalFiles & FileIOPermissionAccess.Write) != 0, "Should have Write bit in AllLocalFiles.");

			p2 = new FileIOPermission(FileIOPermissionAccess.Append | FileIOPermissionAccess.Read, pathArrayGood2);
			p2.AllFiles = FileIOPermissionAccess.Append | FileIOPermissionAccess.Write;
			p2.AllLocalFiles = FileIOPermissionAccess.Write | FileIOPermissionAccess.Read;
			intersection = (FileIOPermission)p.Intersect(p2);
			pathsInPermission = intersection.GetPathList(FileIOPermissionAccess.Read);
			Assert.IsNotNull (pathsInPermission, "Should have some paths");
			Assert.AreEqual (2, pathsInPermission.Length, "Should contain correct number of Read paths");
			Assert.AreEqual ( FileIOPermissionAccess.Append, intersection.AllFiles, "Should have only Append bit in AllFiles.");
			Assert.AreEqual ( FileIOPermissionAccess.Write, intersection.AllLocalFiles, "Should have only Write bit in AllLocalFiles.");

			intersection = (FileIOPermission)p2.Intersect(p);
			pathsInPermission = intersection.GetPathList(FileIOPermissionAccess.Read);
			Assert.IsTrue (pathsInPermission.Length == 2, "Should contain correct number of Read paths. Expected 2 but got: "+pathsInPermission.Length);
			Assert.IsTrue(intersection.AllFiles == FileIOPermissionAccess.Append, "Should have only Append bit in AllFiles.");
			Assert.IsTrue(intersection.AllLocalFiles == FileIOPermissionAccess.Write, "Should have only Write bit in AllLocalFiles.");
		}