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i am getting this error continously , please anyone help me.
program.csnamespace IMAGE
    static class Program
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        static void Main()
            Application.Run(new Form1());// error coming here.
this is my form:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Configuration;
namespace IMAGE
    public partial class Form1 : Form
        public Form1()
        static string cnstr = ConfigurationSettings.AppSettings["list"];
        static SqlConnection con = new SqlConnection(cnstr);
        private void button1_Click(object sender, EventArgs e)
            OpenFileDialog open = new OpenFileDialog();
            // image filters
            open.Filter = "Image Files(*.jpg; *.jpeg; *.gif; *.bmp)|*.jpg; *.jpeg; *.gif; *.bmp";
            if (open.ShowDialog() == DialogResult.OK)
                // display image in picture box
                pictureBox1.Image = new Bitmap(open.FileName);
                // image file path
                txtimg.Text = open.FileName;

        private void button2_Click(object sender, EventArgs e)
            SqlCommand cmd = new SqlCommand("men_in");
            cmd.Parameters.AddWithValue("@sl_no", txtslno.Text);
            cmd.Parameters.AddWithValue("@car_name", txtcar.Text);
            cmd.Parameters.AddWithValue("@Date_service_given", dateTimePicker1.Value);
            cmd.Parameters.AddWithValue("@Date_completed", dateTimePicker2.Value);
            cmd.Parameters.AddWithValue("@cost", txtcost.Text);
            cmd.Parameters.AddWithValue("@car_image", txtimg.Text);
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            DataSet ds = new DataSet();
            da.Fill(ds, "service");
Posted 5-Sep-12 21:22pm
Edited 6-Sep-12 11:25am
(no name)104.2K
Sergey Alexandrovich Kryukov at 6-Sep-12 3:28am
I don't see the code relevant to the problem. You need to run it under debugger to see where is the problem and/or provide complete exception information, importantly, with full stack dump (Exception.Stack).
Wes Aday at 6-Sep-12 17:28pm
You do not say what exception you are getting but my guess would be in this line: static SqlConnection con = new SqlConnection(cnstr);
second guess would be : static string cnstr = ConfigurationSettings.AppSettings["list"];

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