Nested If condition

 con.Open();
        var = DropDownList1.SelectedValue;
        if (DropDownList1.SelectedValue== var)
        {
            cmd = new SqlCommand("insert into Cal_Residential(Title_of_Programme,GroupID,Program_Start_Date,Program_End_Date,Venue,Fee,PO_Number) values(@Title_of_Programme,@GroupID,@Program_Start_Date,@Program_End_Date,@Venue,@Fee,@PO_Number)", con);
            cmd.Parameters.AddWithValue("@Title_of_Programme", TextBox1.Text);
            cmd.Parameters.AddWithValue("@GroupID", DropDownList2.SelectedItem.Text);
            cmd.Parameters.AddWithValue("@Program_Start_Date", Convert.ToDateTime(TextBox5.Text));
            cmd.Parameters.AddWithValue("@Program_End_Date", Convert.ToDateTime(TextBox6.Text));
            cmd.Parameters.AddWithValue("@Venue", tbVenue.Text);
            cmd.Parameters.AddWithValue("@Fee", tbTotalFee.Text);
            cmd.Parameters.AddWithValue("@PO_Number", TextBox4.Text);
            cmd.ExecuteNonQuery();
            Response.Write("<script LANGUAGE='JavaScript'>alert('Successfully Submitted')</script>");
            
            string sv;
            sv=DropDownList2.SelectedValue.ToString();

            cmd1=new  SqlCommand("insert into " +sv +"  values (@GroupID, @ProgrammeType,@Title,@ProgramStartDate,@ProgramEndDate,@FiancialYear,@Venue,@TFee,@PO_number)",con);
            
            cmd1.Parameters.AddWithValue("@GroupID", DropDownList2.SelectedItem.Text);
            cmd1.Parameters.AddWithValue("@ProgrammeType", DropDownList1.SelectedItem.Text);
            cmd1.Parameters.AddWithValue("@Title", TextBox1.Text);
            cmd1.Parameters.AddWithValue("@ProgramStartDate", Convert.ToDateTime(TextBox5.Text));
            cmd1.Parameters.AddWithValue("@ProgramEndDate", Convert.ToDateTime(TextBox6.Text));
            cmd1.Parameters.AddWithValue("@FiancialYear", TextBox7.Text);
            cmd1.Parameters.AddWithValue("@Venue", tbVenue.Text);
            cmd1.Parameters.AddWithValue("@TFee", tbTotalFee.Text);
            cmd1.Parameters.AddWithValue("@PO_number", TextBox4.Text);
            cmd1.ExecuteNonQuery();
            con.Close();

            
        }