Backup of your database either from ASP.NET or C#.NET

using System.Data;
using System.Data.SqlClient;
using System.IO;

public partial class _Default : System.Web.UI.Page
{
    //Metioned here your database name
    string dbname = "test1";
    SqlConnection sqlcon=new SqlConnection();
    SqlCommand sqlcmd = new SqlCommand();
    SqlDataAdapter da = new SqlDataAdapter();
    DataTable dt = new DataTable();

    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        //Mentioned Connection string make sure that user id and password sufficient previlages
        sqlcon.ConnectionString = @"Server=MOHANDB\SQLEXPRESS;database=" + dbname + ";uid=ravindran;pwd=srirangam;";

        //Enter destination directory where backup file stored
        string destdir = "D:\\backupdb";

        //Check that directory already there otherwise create
        if (!System.IO.Directory.Exists(destdir))
        {
            System.IO.Directory.CreateDirectory("D:\\backupdb");
        }
        try
        {
            //Open connection
            sqlcon.Open();
            //query to take backup database
            sqlcmd = new SqlCommand("backup database test to disk='" + destdir + "\\" + DateTime.Now.ToString("ddMMyyyy_HHmmss") + ".Bak'", sqlcon);
            sqlcmd.ExecuteNonQuery();
            //Close connection
            sqlcon.Close();
            Response.Write("Backup database successfully");
        }
        catch (Exception ex)
        {
            Response.Write("Error During backup database!");
        }
    }
}