You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''btechstudent_academics' set Tenth=@Tenth Where Regd_no=@Regd_no'

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using MySql.Data.MySqlClient;
using System.IO;

public partial class BtechSrtudentUpdate : System.Web.UI.Page
{
    MySqlConnection conn1 = new MySqlConnection("Server=localhost;Database=test;Uid=root;Pwd=1234");
    
    string r=" ";
    protected void Page_Load(object sender, EventArgs e)
    {
        
        TextBoxtRegd.Text = Request.QueryString["regd"];
        
        TextBoxTenth.Text = Request.QueryString["Tenth"];
       
        
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string Regd_no;
		Double Tenth;
        Regd_no = TextBoxtRegd.Text;
        Tenth = Convert.ToDouble(TextBoxTenth.Text);
         
        conn1.Open();
        string sql2 = "UPDATE 'btechstudent_academics' set Tenth=@Tenth" + " Where Regd_no=@Regd_no;";
        MySqlCommand cmd2 = new MySqlCommand(sql2, conn1);
        MySqlParameter param = new MySqlParameter("@Tenth",MySqlDbType.Double );
        param.Value = Tenth;
        cmd2.Parameters.Add(param );
        MySqlParameter param1 = new MySqlParameter("@Regd_no", MySqlDbType.VarChar,10);
        param.Value = Regd_no ;
        cmd2.Parameters.Add(param1);
     
        try
        {
            Response.Write("HI");
            cmd2.ExecuteNonQuery();

            Response.Write("HI2");
        }
        catch (Exception x)
        { Label1.Text = " " + x.Message; }
        finally
        {
            conn1.Close();
        }
        
    }
    protected void TextBox1_TextChanged(object sender, EventArgs e)
    {

    }
    protected void TextBoxBacklog_TextChanged(object sender, EventArgs e)
    {

    }
    protected void TextBoxTenth_TextChanged(object sender, EventArgs e)
    {

    }
    protected void TextBox9_TextChanged(object sender, EventArgs e)
    {

    }
}