Confusing If Statement?

Question

I always use If statement (In C#) as (1. Alternative);

if (IsSuccessed == true)
{
   //
}

I know that there is no need to write \"== true\"

Answer 1

I'll go for the second. It's easier for me at least. In the first alternative I always wonder why the comparison is made. Check the type of the left hand side just to be sure that no developer on acid overloaded the == operator making comparison between his class and bool an option.
The first also leads to bugs the second won't.
if(a) might need to be change to if(a||b) or if(a&&b) in the first version it might end up as if(a == true || b) and if(a == true && b) in the former b is redundant and the latter equals if(a==b)