using System.Collections;
using System.Text.RegularExpressions;
using System.Collections.Generic;
using System.Collections.Specialized;

    public static class SQLFunctions
    {

        public static ArrayList ParseForGo(String query)
        {
            // If 'GO' keyword is present, separate each subquery, so they can be run separately.
            // Use Regex class, as we need a case insensitive match.

            string separator = "GO";
            Regex r = new Regex(string.Format(@"^\s*{0}\s*$", separator), RegexOptions.IgnoreCase | RegexOptions.Multiline);
            MatchCollection mc = r.Matches(query);
            ArrayList queries = new ArrayList();
            int pos = 0;
            foreach (Match m in mc)
            {
                string sub = query.Substring(pos, m.Index - pos).Trim();
                if (sub.Length > 0) queries.Add(sub);
                pos = m.Index + m.Length + 1;
            }

            if (pos < query.Length)
            {
                string finalQuery = query.Substring(pos).Trim();
                if (finalQuery.Length > 0) queries.Add(finalQuery);
            }

            return queries;

        }
}

To call this:

 // If the user has selected text within the query window, just execute the
                // selected text.  Otherwise, execute the contents of the whole textbox.
                string allquerytext = txtQuery.SelectedText.Length == 0 ? txtQuery.Text : txtQuery.SelectedText;
                //                if (query.Trim() == "") return;

                // now parse for the go operatory
                ArrayList queries = new ArrayList();
                if (chkAdhocParseForGo.Checked)
                {
                    queries = parseForGo(allquerytext);
                }
                else
                {
                    queries.Add(allquerytext);
                }