I have a winform with preloaded DataGridView over it...I want to remove rows from datagridview on selecting or highlighting the rows and clicking over the button...
If you have AllowUserToAddRows
enabled on your DataGridView then you might be accidently deleting the empty row at the bottom of the DataView which is a placeholder for the next user created row. Try disabling this option if not required, otherwise try using code like this:
foreach (DataGridViewRow row in dataGridView1.SelectedRows)
{
if(!row.IsNewRow)
dataGridView1.Rows.Remove(row);
}