C#

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Web;
using System.Web.Services;
using System.Data.SqlClient;
using System.IO;
using System.Text;
using System.Net;
using System.Xml;

using System.Runtime.InteropServices;
namespace WebService1
{
	/// <summary>
	/// Summary description for Service1.
	/// </summary>
	public class Service1 : System.Web.Services.WebService
	{
		string con;
		string ini_path;
		string tc_server="";
		string tc_database="";
		string tc_un="";
		string tc_pwd="";
		string tc_server_str="";
		public Service1()
		{
			//CODEGEN: This call is required by the ASP.NET Web Services Designer
			InitializeComponent();
			ReadIniSettings();
			con=CreateConnectionString();
		}
		SqlConnection myConnectionCP2 = new SqlConnection(con);   


		#region Component Designer generated code
		
		//Required by the Web Services Designer 
		private IContainer components = null;
				
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if(disposing && components != null)
			{
				components.Dispose();
			}
			base.Dispose(disposing);		
		}
		
		#endregion
		void ReadIniSettings()
		{
			ini_path="F:\\Web\\tr\\htdocs\\cpbl4\\";
			tc_server = IniFile.ReadValue(ini_path,"TC","Server");
			tc_database=IniFile.ReadValue(ini_path,"TC","Database");
			tc_un=IniFile.ReadValue(ini_path,"TC","UN");
			tc_pwd=IniFile.ReadValue(ini_path,"TC","Pwd");
		
		}
		string CreateConnectionString()
		{
			tc_server_str=SQLConn.CreateConnStr(tc_server,tc_un,tc_pwd,tc_database);
			return tc_server_str;
			
		}
	}
	public class IniFile
	{
		[DllImport("kernel32")]
		private static extern long WritePrivateProfileString(string section,string key, string val, string filePath);
		[DllImport("kernel32")]
		private static extern int GetPrivateProfileString(string section,string key, string def, StringBuilder retVal,int size, string filePath);
 
		public static void WriteValue(string path, string Section, string Key, string Value)
		{
			WritePrivateProfileString(Section, Key, Value, path);
		}
 
		public static string ReadValue(string path, string Section, string Key)
		{
			StringBuilder temp = new StringBuilder(255);
			int i = GetPrivateProfileString(Section, Key, "", temp, 255, path);
			return temp.ToString();
		}
	}
	public class SQLConn
	{
		//SqlConnection myConnectionCP2;
		public static string CreateConnStr(string server, string un, string pwd, string db)
		{
			string connStr = "server="+server+";max pool size = 7500;uid="+un+";pwd="+pwd+";database="+db+";Connect Timeout=200;"; 
			return connStr;
			
		}
		
       
	}
}

try
{
    try
    {
        ...
    }
    finally
    {
        ...
    }
}
catch
{
    throw;
}