What's the opposite of "is"?

Question

if(myVariable is SomeType)

Out of nothing but curiosity, what's the opposite of that? I want to do something like:

if(!myVariable is SomeType)
if(myVariable is not SomeType)

Neither compile.

Given that "is" is a non-searchable word in most engines, this has been a hard one to find an answer to.

Duplicate:

C# : ‘is’ keyword and checking for Not

Answer 1

Try

if (!(myVariable is SomeType))

Answer 2

You need to surround the statement in parentheses.

if ( !myVariable is SomeType )

That line applies the NOT operator to myVariable, not the entire statement. Try:

if ( !( myVariable is SomeType ) )

Although, I would be wary of code that checks an object for its type anyhow. You may want to look into the concept of polymorphism.