System.Net.Tests.WebUtilityTests.CharRange C# (CSharp) Method

        public static string CharRange(int start, int end)
        {
            Debug.Assert(start <= end);

            int capacity = end - start + 1;
            var builder = new StringBuilder(capacity);
            for (int i = start; i <= end; i++)
            {
                // 0 -> \0, 65 -> A, 0x10FFFF -> \U0010FFFF
                builder.Append(char.ConvertFromUtf32(i));
            }
            return builder.ToString();
        }
    }