how to take Dump of a process

using System;
using System.Reflection;
using System.Runtime.Remoting;
using System.Runtime.InteropServices;
using System.IO;
using System.Threading;
using System.Globalization;
using System.Diagnostics;
using System.Collections.Generic;


public class CallMyHelloWorld
{
    public static void Main()
    {

        AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomainUnhandledException);


    string i;
    i = Console.ReadLine();
    int a = Convert.ToInt32(i);

    int j = 10 / a;
    Console.WriteLine("The Application succeeded");

    }

    public static class MINIDUMPTYPE
    {
        public const int MiniDumpNormal = 0x00000000;
        public const int MiniDumpWithDataSegs = 0x00000001;
        public const int MiniDumpWithFullMemory = 0x00000002;
        public const int MiniDumpWithHandleData = 0x00000004;
        public const int MiniDumpFilterMemory = 0x00000008;
        public const int MiniDumpScanMemory = 0x00000010;
        public const int MiniDumpWithUnloadedModules = 0x00000020;
        public const int MiniDumpWithIndirectlyReferencedMemory = 0x00000040;
        public const int MiniDumpFilterModulePaths = 0x00000080;
        public const int MiniDumpWithProcessThreadData = 0x00000100;
        public const int MiniDumpWithPrivateReadWriteMemory = 0x00000200;
        public const int MiniDumpWithoutOptionalData = 0x00000400;
        public const int MiniDumpWithFullMemoryInfo = 0x00000800;
        public const int MiniDumpWithThreadInfo = 0x00001000;
        public const int MiniDumpWithCodeSegs = 0x00002000;
    }

    [DllImport("dbghelp.dll")]
    public static extern bool MiniDumpWriteDump(IntPtr hProcess, 
                                                Int32 ProcessId, 
                                                IntPtr hFile, 
                                                int DumpType, 
                                                IntPtr ExceptionParam, 
                                                IntPtr UserStreamParam, 
                                                IntPtr CallackParam);
    private static void CurrentDomainUnhandledException(object sender, 
                                                        UnhandledExceptionEventArgs e)
    {
            CreateMiniDump();
    }

    private static void CreateMiniDump()
    {
        DateTime endTime = DateTime.Now;

        string dt = endTime.ToString("yyyy.MM.dd.HH.mm.ss", DateTimeFormatInfo.InvariantInfo);

        System.Diagnostics.Process[] process = System.Diagnostics.Process.GetProcessesByName("Test_app");

       string dumpFileName = "C:\\HelloWorldDump" + process[0] + dt + ".dmp";

        FileStream fs = new FileStream(dumpFileName, FileMode.Create);


        MiniDumpWriteDump(process[0].Handle, 
                          process[0].Id, 
                          fs.SafeFileHandle.DangerousGetHandle(), 
                          MINIDUMPTYPE.MiniDumpWithFullMemory, 
                          IntPtr.Zero, 
                          IntPtr.Zero, 
                          IntPtr.Zero);

         }
}