C# converting string to hex and XOR on Hex numbers

Question

Im tring to do an XOR on 2 hex numbers to create a unique hex number

ex. 7F4 ^ 65D which would equal 1A9

I understand how the XOR should work but every time I try to convert the string hex number:

string hex1 = "7F4";
int hexInt = Convert.ToInt32(hex1, 16);

I end up with a number: 2036

How do I keep the integrity of the hex number so I can do an XOR on the 2 hex numbers?

Answer 1

A number is a number, hexadecimal is just the way the number is displayed.

7F4 hexadecimal equals 2036 decimal, and you can perform bitwise operations on it, they will produce the correct output.

Answer 2

Convert the hexadecimal strings to normal integers, perform the XOR on the integers and then format the resulting integer into a hexadecimal string.

string hex1 = "7F4";
string hex2 = "65D";
int dec1 = Convert.ToInt32(hex1, 16);
int dec2 = Convert.ToInt32(hex2, 16);
int result = dec1 ^ dec2;
string hexResult = result.ToString("X");