CS0133 “The expression being assigned to 'identifier' must be constant” - what's the reason behind that?

Question

With a lot of C++ background I\'ve got used to writing the following:

const int count = ...; //some non-trivial stuff here
for( int i = 0; i < count; i++          


        

Answer 1

You can't assign a variable number to a const. It is a compile time constant.

From the C# reference on const:

A constant expression is an expression that can be fully evaluated at compile time.