Question

I have a method which takes a hex value and assign it as a plaintext but type of byte like that

byte plainText = 0xd7;

I want to take this value from textbox ,for exmaple the user will type d7 to textbox and ı will assign it like

byte plaintText = 0xd7

I could not achive that.

Answer 1

You can use the Convert.ToByte(String, Int32) method with the base set to 16 (hexadecimal):

String text = "d7";
byte value = Convert.ToByte(text, 16);