System.Security.Permissions.UrlIdentityPermissionAttribute.CreatePermission C# (CSharp) Method

        public override IPermission CreatePermission()
        {
            return default(IPermission);
        }

		public void DefaultPermission () 
		{
			UrlIdentityPermissionAttribute a = new UrlIdentityPermissionAttribute (SecurityAction.Assert);
			Assert.IsNull (a.Url, "Url");
			// UrlIdentityPermission would throw a ArgumentNullException for a null URL ...
			UrlIdentityPermission perm = (UrlIdentityPermission) a.CreatePermission ();
			// ... but this works ...
			Assert.IsNotNull (perm, "CreatePermission(null url)");
			// ... but this doesn't!
			string url = perm.Url;
			Assert.AreEqual (String.Empty, url, "Url-2");
		}