How can I enter data from a DataGridView to an SQL table through Linq?

I have to fill a table with the data from a DataGridView but I can not do it, I pass the data to a first DataGriView. All this with LINQ

After filling the first DataGriView I want the "Save Week" button to save the data in SQQL and show it in the second DataGriView (with show I have no problem). The code of the button is:

private void button2_Click(object sender, EventArgs e)
    {
DataGridView Grid = dataGridView1;
        for (int fila = 0; fila < Grid.Rows.Count - 1; fila++)
        {
            for (int col = 0; col < Grid.Rows[fila].Cells.Count; col++)
            {
                MenuporSemana ms = new MenuporSemana();                                        
                ms.Año = Convert.ToInt32(Grid.Rows[fila].Cells[col].Value.ToString());
                ms.Semana = Convert.ToInt32(Grid.Rows[fila].Cells[col].Value.ToString());
                ms.Dia = Grid.Rows[fila].Cells[col].Value.ToString();
                ms.Sopa = Grid.Rows[fila].Cells[col].Value.ToString();
                ms.Guisado = Grid.Rows[fila].Cells[col].Value.ToString();
                Datos.MenuporSemana.InsertOnSubmit(ms);
                Datos.SubmitChanges();
            }
        }
     }

He had also tried to do it with Foreach and had it in the following way:

foreach (DataGridViewRow GVRow in dataGridView1.Rows)

{
   MenuporSemana ms = new MenuporSemana();
   ms.Año = Convert.ToInt32(dataGridView1.Cells[0].Value.ToString());
   ms.Semana = Convert.ToInt32(GVRow.Cells[1].Value.ToString());
   ms.Dia = GVRow.Cells[2].Value.ToString();
   ms.Sopa = GVRow.Cells[3].Value.ToString();
   ms.Guisado = GVRow.Cells[4].Value.ToString();
   Datos.MenuporSemana.InsertOnSubmit(ms);
   Datos.SubmitChanges();
}

But neither of the two worked and I would like to know how to implement that part or if there is another way to do it. Thanks.