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class X {
static object get_non_null ()
{
return new X ();
}
static object get_null ()
{
return null;
}
public static int Main ()
{
int a = 5;
object o;
decimal d = 0M;
//
// compile time
//
if (!(get_non_null () is object))
return 1;
if (get_null () is object)
return 2;
if (!(a is object))
return 3;
//
// explicit reference
//
if (null is object)
return 4;
o = a;
if (!(o is int))
return 5;
if (d is int)
return 6;
object oi = 1;
if (!(oi is int))
return 7;
System.Console.WriteLine ("Is tests pass");
return 0;
}
}
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