System.Tests.StringTests.IsSafeForCurrentCultureComparisons C# (CSharp) Method

        private static bool IsSafeForCurrentCultureComparisons(string str)
        {
            for (int i = 0; i < str.Length; i++)
            {
                char c = str[i];
                // We only want ASCII chars that you can see
                // No controls, no delete, nothing >= 0x80
                if (c < 0x20 || c == 0x7f || c >= 0x80)
                {
                    return false;
                }
            }
            return true;
        }