public static string getConnectionString(string username, string password, string Datasource, string InitialCatalog)
{
SqlConnectionStringBuilder sb = new SqlConnectionStringBuilder();
sb.ApplicationName = Application.ProductName;
sb.UserID = username;
sb.Password = password;
sb.Pooling = true;
sb.MinPoolSize = 25;
sb.MaxPoolSize = 500;
sb.IntegratedSecurity = false;
sb.InitialCatalog = InitialCatalog;
sb.DataSource = Datasource;
return sb.ConnectionString;
}