Visual Studio .NET Optimizations ?

right click your project name in solution explorer, choose properties, see in the right tab there is a configuration properties and also an optimization option.

when I see the help file, they said this optimizations can make our application faster, smaller but can make debugging difficult.

but when I see my application, there is no files seem smaller and also doesn't make my application run faster, and also there is no such difficult error when debugging.
so what do they mean can make debugging difficult ?
is it safely if I'm always using this option enabled ?
do you guys ever used this option ?

I know what you mean. I have fiddled around with it and it does little to EXE size (but I've only tried it with small programs anyway). It might be that it only has a noticable effect on large programs.

It is safe to use though, it wouldn't be opimising the program if it damaged it!

.Net progs are small enough anyway (usually).