System.Globalization.StringInfo.ParseCombiningCharacters C# (CSharp) Method

        public static int[] ParseCombiningCharacters(String str)
        {
            if (str == null)
            {
                throw new ArgumentNullException("str");
            }
            
            int len = str.Length;
            int[] result = new int[len];
            if (len == 0)
            {
                return (result);
            }

            int resultCount = 0;

            int i = 0;
            int currentCharLen;
            UnicodeCategory currentCategory = CharUnicodeInfo.InternalGetUnicodeCategory(str, 0, out currentCharLen);            
            
            while (i < len) { 
                result[resultCount++] = i;
                i += GetCurrentTextElementLen(str, i, len, ref currentCategory, ref currentCharLen); 
            }

            if (resultCount < len)
            {
                int[] returnArray = new int[resultCount];
                Array.Copy(result, returnArray, resultCount);
                return (returnArray);
            }
            return (result);

        }
    }