As in this example:
switch ( myObj.GetType ( ) )
Console.WriteLine ( "MyObject is here" );
The problem is that
switch (per the spec) only works with primitives (int etc) and strings. But yes, it would be nice to have F#-style matching.
switch-label: case constant-expression : default :
... The governing type of a switch statement is established by the switch expression. If the type of the switch expression is sbyte, byte, short, ushort, int, uint, long, ulong, char, string, or an enum-type, then that is the governing type of the switch statement. Otherwise, exactly one user-defined implicit conversion (§6.4) must exist from the type of the switch expression to one of the following possible governing types: sbyte, byte, short, ushort, int, uint, long, ulong, char, string. If no such implicit conversion exists, or if more than one such implicit conversion exists, a compile-time error occurs.
It is obvious, however, that working with such a restricted set allows for simple (and efficient) IL. Note that
string is handled via a dictionary map to an integer.