I have the following code, If I use conn == null in finally do I still use connection pooling? I know it is a good practice to close your connection but how about disposing the whole connection object?

    public void ExecuteNonQuery(SqlCommand Cmd)
    {
        //========== Connection ==========//
        SqlConnection Conn = new SqlConnection(strConStr);

        try
        {
            //========== Open Connection ==========//
            Conn.Open();

            //========== Execute Command ==========//
            Cmd.Connection = Conn;
            Cmd.CommandTimeout = 180;
            Cmd.ExecuteNonQuery();
        }
        catch (Exception Exc)
        {
            throw Exc;
        }
        finally
        {
            //======== Closing Connection ========//
            if (Conn.State == ConnectionState.Open)
            { Conn.Close(); }

            //======== Disposing object ========//
            Conn = null;
        }
    }