public void Update()
{
string strsql = "update City set " + "CityName= '" + CityName.Replace("'", "''") + "', " + "StateId= " + StateId + ", " + "CountryId= " + CountryId + ", " + "Status= '" + Status.Replace("'", "''") + "' " + " where ID =" + Id;
SqlConnection ObjConnection = new SqlConnection(ConfigurationManager.ConnectionStrings["MyJobPortal"].ConnectionString);
ObjConnection.Open();
SqlCommand ObjCommand = new SqlCommand(strsql, ObjConnection);
ObjCommand.ExecuteNonQuery();
ObjConnection.Dispose();
ObjCommand.Dispose();
}