Understand the shift operator

Question

I can not understand this shift operator (c# reference):

class MainClass1
{
 static void Main()
    {
        int i = 1;
        long lg = 1;
        Console         


        

Answer 1

"The shift operator is essentially "mod" the width of the data."

Rubbish! If the amount of the shift is greater than, or equal to, the width of the data, the result is undefined. Do not expect the same 'mod' operation that you happen to have seen, to happen with different compilers, or different versions of the same compiler, or in different shift situations in the same program, or when anything else changes. That's what 'undefined' means.