Find other char - C#

string word = textBox1.Text.Trim();
            bool containUnicode = false;
            for (int x = 0; x < word.Length; x++)
            {
                if (char.GetUnicodeCategory(word[x]) == UnicodeCategory.OtherLetter)
                {
                    containUnicode = true;
                    break;
                }
            }
            if (containUnicode)
            {
                MessageBox.Show("contain unicode");
            }
            else
            {
                MessageBox.Show("does not contain unicode");
            }
Found in: http://www.daniweb.com/software-development/csharp/threads/301363/c-function-to-check-if-a-string-contain-chinese-charater