date wise filter record in gridview in asp.net

My code is not working for date wise filter record and bind to gridview. giving error

Conversion failed when converting date and/or time from character string.

my code is

protected void btnShow_Click(object sender, EventArgs e)
{
try
{
SqlCommand cmd = new SqlCommand("select * from OrraStock_Sales where createDate between '@fromDt' and '@toDt'", con);
cmd.Parameters.AddWithValue("@fromDt",txtFromDt.Text);
cmd.Parameters.AddWithValue("@toDt",DateTime.Parse(txtToDt.Text));
con.Open();
SqlDataAdapter da = new SqlDataAdapter(cmd);
ds = new DataSet();
da.Fill(ds);
GridView1.DataSource = ds;
GridView1.DataBind();
lblTotRecord.Text = "" + ds.Tables[0].Rows.Count;
con.Close();
}
catch (Exception ex)
{ Response.Write(ex.Message); }
}

Please help me.