Untitled

        public static string GetStringBetweenTwoCharLast(string fullText, string fromText, string toText)
        {
            try
            {
                if (string.IsNullOrEmpty(fullText))
                {
                    return "";
                }
                int pFrom = fullText.IndexOf(fromText) + fromText.Length;
                int pTo = fullText.LastIndexOf(toText);
                if (fullText.IndexOf(fromText) < 0 || pTo < 0)
                {
                    return "";
                }
                return fullText.Substring(pFrom, pTo - pFrom);
            }
            catch (Exception ex)
            {
                return "";
            }

        }

        public static string GetValueFromHeadersSendGrid(string fullText, string headerName)
        {
            if (!string.IsNullOrEmpty(fullText))
            {
                int pFrom = fullText.IndexOf(headerName) + headerName.Length;
                if (fullText.IndexOf(headerName) < 0)
                {
                    return "";
                }
                fullText = fullText.Substring(pFrom, fullText.Length - pFrom);
                int pTo = fullText.IndexOf("\n");
                if (pTo > 0)
                {
                    return fullText.Substring(0, pTo);
                }
            }
            return "";
        }

        public static string GetStringFromBeginToText(string fullText, string toText)
        {
            if (string.IsNullOrEmpty(fullText))
            {
                return "";
            }
            int pTo = fullText.LastIndexOf(toText);
            if (pTo < 0)
            {
                return "";
            }
            return fullText.Substring(0, pTo);
        }
        public static string GetStringFromTextToLast(string fullText, string fromText)
        {
            if (string.IsNullOrEmpty(fullText))
            {
                return "";
            }
            int pTo = fullText.LastIndexOf(fromText);
            if (pTo < 0)
            {
                return "";
            }
            return fullText.Substring(pTo + fromText.Length);
        }