Setting the Dataset of dataGridView object at Runtime

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C#

Hello,

In a program I need to set the Dataset of a DatagridView object at runtime. I used the code below but it throws an Exception. Instead, I used a DatagridView control created at design time and it worked well. I do not know what I missed that I faced the Exception at runtime. Could you please help me?

Thanks a lot

//-------- Setting the Dataset of a dataGridView object
        // ------- At Runtime which throw an Exception

          DataGrid MydataGrid = new DataGrid();
          DataGridView MyDataGridView = new DataGridView();

          DateTime dueDate = new DateTime();

          MydataGrid = myMethod( some inputs );

          MyDataGridView.DataSource = MydataGrid.DataSource;
          int Row_no1 = MyDataGridView.RowCount ; // ->> it returns 0

          dueDate = (DateTime)MyDataGridView.Rows[0].Cells[0].Value; // ->> throw an Exception


        //-------- Setting the Dataset of a dataGridView Control
        // ------- Created at Design time and it works well

          DataGrid MydataGrid2 = new DataGrid();

          DateTime dueDate2 = new DateTime();

          MydataGrid2 = myMethod( same above inputs );

          dataGridView1.DataSource = MydataGrid2.DataSource;
          int Row_no2 = dataGridView1.RowCount ; // ->> it returns 25

          dueDate2 = (DateTime)dataGridView1.Rows[0].Cells[0].Value; // ->> works well