(C#) DataGridView: How to get Selected Count with cells AND rows?

Question

So I have this DataGridView

And This code:

if(dataGridView1.SelectedRows.Count > 1)
        {
            MessageBox.Show("Error: More than one value selected");
            return false;
        }

It counts correctly to 2 if I have 2 completly selected rows. But I want to check if any cells from 2 different rows or more are selected.

In other words: in my picture my current selection is returning 1 at the moment but i want it to return 2.

Thank you.

Edit after fix: Working code:

if(dataGridView1.SelectedCells.Cast<DataGridViewCell>().Select(c => c.RowIndex).Distinct().Count() > 1)
        {
            MessageBox.Show("Error: More than one value selected");
            return false;
        }

Answer 1

To get the number of rows with selected cells :

int count = dataGridView1.SelectedCells.Cast<DataGridViewCell>()
                                       .Select(c => c.RowIndex).Distinct().Count();

To check if more than one row is selected:

var selectedCells = dataGridView1.SelectedCells;
bool check = selectedCells.Count > 0 
         && selectedCells.Cast<DataGridViewCell>().Any(c => c.RowIndex != selectedCells[0].RowIndex);