Simple Code of Login Page Through Store Procedure

Login Code:-

 protected void Login_Click(object sender, EventArgs e)
    {
        SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["con"].ToString());
        string sqlquery = "select count(*) from registration where email=@email and password=@password";
        SqlCommand cmd = new SqlCommand(sqlquery, con);
        cmd.Parameters.AddWithValue("@email", Tlogin.Text);
        cmd.Parameters.AddWithValue("@password", FormsAuthentication.HashPasswordForStoringInConfigFile(Tpassword.Text, "Md5"));



        con.Open();
        int i = (int)cmd.ExecuteScalar();
        if (i > 0)
        {
            Response.Write("Congrachulations! U successfully enter in profile");
        }
        else
        {
            Response.Write("Please check username or password");
        }
        con.Close();
    }