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+.NET and X# permit an enhanced casting of variables. Using the casting the compiler can will check the properties and methods of the object.
+<code>local oObject as object
+local oDateTime as object
+oObject	:= DateTime.Now
+oObject:AddYears( 1 ) // compiler error here
+( ( DateTime ) oObject ):AddYears( 1 ) // works
+oDateTime := oObject // compiler error here
+oDateTime := ( DateTime ) oObject //works</code>
+The ''astype'' statement is an advanced form of casting, but if works only on datatypes that can be null:
+<code>oString := oObject asytype string</code>
+In the case that oObject is not a string, the null value is assigned to the oString variable.
+The following code will not work as ''DateTime'' cannot have a null value:
+<code>local oDateTime as DateTime
+oDateTime := oObject astype DateTime</code>
+This code will only work if you use ''Nullable<DateTime>'' instead of ''DateTime''