Export datagrid to .csv in WPF

if (myGrid.RowCount > 0)
{
    string value = "";
    DataGridViewRow dr = new DataGridViewRow();
    StreamWriter sWriter = new StreamWriter(fileLocation);

    //write header rows to csv
    for (int i = 0; i <= myGrid.Columns.Count - 1; i++)
    {
        if (i > 0)
        {
            sWriter.Write(",");
        }
        sWriter.Write(myGrid.Columns[i].HeaderText);
    }
    sWriter.WriteLine();

    //write DataGridView rows to csv
    for (int j = 0; j <= myGrid.Rows.Count - 1; j++)
    {
        if (j > 0)
        {
            sWriter.WriteLine();
        }

        dr = myGrid.Rows[j];

        for (int i = 0; i <= myGrid.Columns.Count - 1; i++)
        {
            if (i > 0)
            {
                sWriter.Write(",");
            }

            value = dr.Cells[i].Value.ToString();
            //replace comma's with spaces
            value = value.Replace(',', ' ');
            //replace embedded newlines with spaces
            value = value.Replace(Environment.NewLine, " ");

            sWriter.Write(value);
        }
    }
    sWriter.Close();
    MessageBox.Show("Exported succesfully.");
}