How to keep constant rowcount for Datagrid view in Virtual Mode?

Question

I have implemented data grid view in virtual mode. My data source contains 5k entries. At a time I want to load only 50. Is there a possibility to delete previous row and add a new one on scroll. So that row count remains constant.

Ex.

public void DataGridView1_Scroll(object sender, ScrollEventArgs e)
        {
int startIndex = dataGridView1.FirstDisplayedScrollingRowIndex;
int endIndex = startIndex + 50 + 1;
//set datagrid view count to end index
dataGridView1.RowCount = endIndex;
//remove previous rows
  startIndex = startIndex - 1;

                    while (startIndex != -1)
                    {
                        dataGridView1.Rows.RemoveAt(startIndex);
                        startIndex--;
                    }
}