int i = 20;
string output = Convert.ToString(i, 2); // Base2 formatting
i = -20;
output = Convert.ToString(i, 2);
Value Expected Actual 20 00000000000000000000000000010100 10100 -20 10000000000000000000000000010100 11111111111111111111111111101100
I can see that perhaps the binary output of 20 has been truncated but I do not understand the output for -20. I based my expectations on base2 notation plus a belief that the signed element of an integer was expressed in the first left most digit. 0 for positive and 1 for negative. Can someone explain the results, specifically that of -20?