Question

class Program {

        static bool? a = null;
        static bool b = false;

        static void Main( string[] args ) {
            //1
            if( a!=null ) {
                b = (bool) a;
            }
            //2
            if( a!=null && (b=(bool) a) ) { }
        }
    }

Is there any difference between the case #1 and the case #2?

Answer 1

In terms of the value b will get, they are functionally the same.

Though, since you are using nullables, you should be using their features:

if(a.HasValue)
   b = a.Value;