问我有任何SQL泄漏吗？

EN

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.XPath;
using System.Xml.Serialization;
using System.Data.Sql;
using System.Xml.Linq;
using System.Diagnostics;
using System.Data.SqlClient;
using System.Data.ProviderBase;
using System.Data.Common;
using System.Data.SqlTypes;
using System.Management;
using System.Net;
using System.Threading;

namespace AppServerTracker
{
    class Tracker
    {
        int intConnCount;
        string strServer;
        string strUserName;
        Process[] process = Process.GetProcessesByName("MShell");
        public static string strInput = "http://Website.for.load.Balancer.com";

        string strErrorMSG = "No Error"; //will show that there has been no error in the table.

        private static string SQLConnectionString = Properties.Resources.ConnStage;
        public SqlConnection SQLConnection = new SqlConnection(SQLConnectionString);

        public Tracker()
        {

        }

        public void Main()
        {
            if (process.Length > 0)
            {
                intConnCount = process.Length;

                ManagementScope ms = new ManagementScope("\\\\.\\root\\cimv2");
                ObjectQuery query = new ObjectQuery("SELECT * FROM Win32_ComputerSystem");
                ManagementObjectSearcher searcher = new ManagementObjectSearcher(ms, query);
                foreach (ManagementObject mo in searcher.Get())
                {
                    strUserName = mo["UserName"].ToString();
                }
                // Remove the domain part from the username
                string[] usernameParts = strUserName.Split('\\');
                // The username is contained in the last string portion.
                strUserName = usernameParts[usernameParts.Length - 1];

                string strComputerName = Environment.MachineName;

                if (isValid(strInput))
                {
                    try
                    {
                        XmlReader xmlReader = XmlReader.Create(strInput);
                        using (xmlReader)
                        {
                            while (xmlReader.Read())
                            {
                                if (xmlReader.NodeType == XmlNodeType.Text)
                                {
                                    strServer = xmlReader.Value.ToString();
                                    strServer = strServer.Replace("\r", "");
                                    strServer = strServer.Replace("\n", "");
                                    strServer = strServer.Replace(" ", "");
                                }
                            }
                            xmlReader.Close();
                        }
                    }
                    catch (Exception e)
                    {
                        strServer = "Error";
                        strErrorMSG = "Error with the xmlReader Exception as follows: " + e.ToString();
                    }
                    finally
                    {
                    }
                }
                else
                {
                    strServer = "XML-Missing";
                }

                try
                {
                    using (SQLConnection)
                    {
                        SQLConnection.Open();
                        using (SqlCommand TrackSproc = new SqlCommand("spServerTracking", SQLConnection))
                        {
                            TrackSproc.CommandType = System.Data.CommandType.StoredProcedure;
                            TrackSproc.Parameters.AddWithValue("@UserName", strUserName);
                            TrackSproc.Parameters.AddWithValue("@Server", strServer);
                            TrackSproc.Parameters.AddWithValue("@ConnCount", intConnCount);
                            TrackSproc.Parameters.AddWithValue("@MachineName", strComputerName);
                            TrackSproc.Parameters.AddWithValue("@Error", strErrorMSG);
                            TrackSproc.ExecuteNonQuery();
                        }
                    }
                }
                catch (Exception e)
                {
                    // E-mail Exception 
                }
                finally
                {
                    SQLConnection.Close();
                }
            }
        }

        public bool isValid(string url)
        {
            HttpWebRequest urlReq;
            HttpWebResponse urlRes;
            try
            {
                urlReq = (HttpWebRequest)WebRequest.Create(url);
                urlReq.Method = "HEAD";
                urlReq.Timeout = 100000;
                urlRes = (HttpWebResponse)urlReq.GetResponse();
                urlRes.Close();
                return true;
            }
            catch (Exception ex)
            {
                //Url not valid
                strErrorMSG = "Exception From isValid Method. Exception to follow: " + ex.ToString();
                return false;
            }

        }
    }
}