Send mail for Contact Us page

<div>
<table>
            <tr>
                <td>
                    Your name:
                </td>
                <td>
                    <asp:TextBox ID="YourName" runat="server" Width="250px" />
                </td>
            </tr>
            <tr>
                <td>
                    Your age:
                </td>
                <td>
                    <asp:TextBox ID="YourAge" runat="server" Width="250px" />
                </td>
            </tr>
            <tr>
                <td>
                    Gender:
                </td>
                <td>
                    <asp:TextBox ID="txtGender" runat="server" Width="250px" />
                </td>
            </tr>
            <tr>
                <td>
                    Mobile:
                </td>
                <td>
                    <asp:TextBox ID="txtMobile" runat="server" />
                </td>
            </tr>

             <tr>
                <td>
                   EmailID
                </td>
                <td>
                    <asp:TextBox ID="txtEmailID" runat="server" />
                </td>
            </tr>

             <tr>
                <td>
                 Description:
                </td>
                <td>
                    <asp:TextBox ID="txtdescrition" runat="server" />
                </td>
            </tr>
            <tr>
            <td colspan="2">
            <asp:Button ID="Button1" runat="server" Text="Send" 
                    OnClick="Button1_Click" ValidationGroup="save" />
            </td>
            
            </tr>
            <tr>
            <td colspan="2"><asp:label id="DisplayMessage" runat="server" visible="false" xmlns:asp="#unknown" /></td>
            </tr>
        </table>

</div>

protected void SendMail()
    {
        // Gmail Address from where you send the mail
        var fromAddress = "Your email address";
        // any address where the email will be sending
        var toAddress = txtEmailID.Text.ToString();
        //Password of your gmail address
        const string fromPassword = "Password";
        // Passing the values and make a email formate to display
        string subject = txtdescrition.Text.ToString();
        string body = "From: " + YourName.Text + "\n";
        body += "Email: " + txtEmailID.Text + "\n";
        body += "Subject: " + txtdescrition.Text + "\n";
        body += "Mobile: \n" + txtMobile.Text + "\n";
        // smtp settings
        var smtp = new System.Net.Mail.SmtpClient();
        {
            smtp.Host = "smtp.gmail.com";
            smtp.Port = 587;
            smtp.EnableSsl = true;
            smtp.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
            smtp.Credentials = new NetworkCredential(fromAddress, fromPassword);
            smtp.Timeout = 20000;
        }
        // Passing values to smtp object
        smtp.Send(fromAddress, toAddress, subject, body);
    }

    protected void Button1_Click(object sender, EventArgs e)

   {
        SendMail();
        try
        {
            //here on button click what will done 
            SendMail();
            DisplayMessage.Text = "Your Comments after sending the mail";
            DisplayMessage.Visible = true;
            YourSubject.Text = "";
            txtEmail.Text = "";
            YourName.Text = "";
            Comments.Text = "";
        }
        catch (Exception) { }
    }