Store multiple TextBox values (Comma Separated) in one column in ASP.Net C#

This Way 

HTML:

<form id="form1" runat="server">
    <div>
        <asp:TextBox ID="txtId" runat="server" />
        <br />
        <asp:TextBox ID="txtName" runat="server" />
        <br />
        <asp:TextBox ID="txtCity" runat="server" />
        <br />
        <asp:TextBox ID="txtState" runat="server" />
        <br />
        <asp:TextBox ID="txtSchool" runat="server" />
        <br />
        <asp:TextBox ID="txtSSC" runat="server" />
        <br />
        <asp:TextBox ID="txtHSC" runat="server" />
        <br />
        <asp:TextBox ID="txtUniversity" runat="server" />
        <br />
        <asp:Button Text="Save" OnClick="Save" runat="server" />
    </div>
    </form>

C#:

protected void Save(object sender, EventArgs e)
        {
            string id = this.txtId.Text == string.Empty ? "" : this.txtId.Text + ",";
            string name = this.txtName.Text == string.Empty ? "" : this.txtName.Text + ",";
            string city = this.txtCity.Text == string.Empty ? "" : this.txtCity.Text + ",";
            string state = this.txtState.Text == string.Empty ? "" : this.txtState.Text + ",";
            string school = this.txtSchool.Text == string.Empty ? "" : this.txtSchool.Text + ",";
            string ssc = this.txtSSC.Text == string.Empty ? "" : this.txtSSC.Text + ",";
            string hsc = this.txtHSC.Text == string.Empty ? "" : this.txtHSC.Text + ",";
            // as University is the last TextBox then dont add , in the end
            string university = this.txtUniversity.Text == string.Empty ? "" : this.txtUniversity.Text;
            string final = id + name + city + state + school + ssc + hsc + university;
            string output = final.Remove(final.Length - 1);
            string constr = ConfigurationManager.ConnectionStrings["ConString2"].ConnectionString;
            using (SqlConnection _cn = new SqlConnection(constr))
            {
                using (SqlCommand _cmd = new SqlCommand("INSERT INTO Description VALUES(@Value)", _cn))
                {
                    using (SqlDataAdapter da = new SqlDataAdapter(_cmd))
                    {
                        _cn.Open();
                        _cmd.Parameters.AddWithValue("@Value", output);
                        _cmd.ExecuteNonQuery();
                    }
                }
            }
        }

Thank You.