System.Data.ExprException.InvalidName C# (CSharp) Метод

        public static Exception InvalidName(string name)
        {
            return _Syntax(SR.Format(SR.Expr_InvalidName, name));
        }

        /// <devdoc>
        ///     Parses given name and checks it validity
        /// </devdoc>
        internal static string ParseName(char[] text, int start, int pos)
        {
            char   esc           = '\0';
            string charsToEscape = "";
            int    saveStart     = start;
            int    savePos       = pos;

            if (text[start] == '`')
            {
                Debug.Assert(text[checked ((int)pos - 1)] == '`', "Invalid identifyer bracketing, pos = " + pos.ToString(CultureInfo.InvariantCulture) + ", end = " + text[checked ((int)pos - 1)].ToString(CultureInfo.InvariantCulture));
                start         = checked ((int)start + 1);
                pos           = checked ((int)pos - 1);
                esc           = '\\';
                charsToEscape = "`";
            }
            else if (text[start] == '[')
            {
                Debug.Assert(text[checked ((int)pos - 1)] == ']', "Invalid identifyer bracketing of name " + new string(text, start, pos - start) + " pos = " + pos.ToString(CultureInfo.InvariantCulture) + ", end = " + text[checked ((int)pos - 1)].ToString(CultureInfo.InvariantCulture));
                start         = checked ((int)start + 1);
                pos           = checked ((int)pos - 1);
                esc           = '\\';
                charsToEscape = "]\\";
            }

            if (esc != '\0')
            {
                // scan the name in search for the ESC
                int posEcho = start;

                for (int i = start; i < pos; i++)
                {
                    if (text[i] == esc)
                    {
                        if (i + 1 < pos && charsToEscape.IndexOf(text[i + 1]) >= 0)
                        {
                            i++;
                        }
                    }
                    text[posEcho] = text[i];
                    posEcho++;
                }
                pos = posEcho;
            }

            if (pos == start)
            {
                throw ExprException.InvalidName(new string(text, saveStart, savePos - saveStart));
            }

            return(new string(text, start, pos - start));
        }