In C#, how can I detect if a character is a non-ASCII character?

Question

I would like to check, in C#, if a char contains a non-ASCII character. What is the best way to check for special characters such as 志 or Ω?

Answer 1

ASCII ranges from 0 - 127, so just check for that range:

char c = 'a';//or whatever char you have
bool isAscii = c < 128;