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

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;

Answer 2

bool HasNonASCIIChars(string str)
{
    return (System.Text.Encoding.UTF8.GetByteCount(str) != str.Length);
}