public void Delete() { MySqlConnection conn = DB.Connection(); conn.Open(); var cmd = conn.CreateCommand() as MySqlCommand; cmd.CommandText = @"DELETE FROM message WHERE id = @thisId;"; MySqlParameter idParameter = new MySqlParameter(); idParameter.ParameterName = "@thisId"; idParameter.Value = _id; cmd.Parameters.Add(idParameter); cmd.ExecuteNonQuery(); conn.Close(); if (conn != null) { conn.Dispose(); } }