how to generate a dump file on application crash in c#

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.IO;

namespace DBGHelp_Sample
    static class Program
        /// The main entry point for the application.
        static void Main()
            AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);

            Application.Run(new Form1());

        public static class MINIDUMP_TYPE
            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;

        public static extern bool MiniDumpWriteDump(IntPtr hProcess,
                                                    Int32 ProcessId,
                                                    IntPtr hFile,
                                                    int DumpType,
                                                    IntPtr ExceptionParam,
                                                    IntPtr UserStreamParam,
                                                    IntPtr CallackParam);

        private static void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)

        private static void CreateMiniDump()
            using(FileStream fs = new FileStream("UnhandledDump.dmp", FileMode.Create))
                using(System.Diagnostics.Process process = System.Diagnostics.Process.GetCurrentProcess())

Another Option:

 using System;
 using System.ComponentModel;
 using System.Diagnostics;
 using System.IO;
 using System.Runtime.InteropServices;

 namespace ConsoleApplication29
 class Program
 enum MINIDUMP_TYPE: uint
 MiniDumpNormal = 0x00000000,
 MiniDumpWithDataSegs = 0x00000001,
 MiniDumpWithFullMemory = 0x00000002,
 MiniDumpWithHandleData = 0x00000004,
 MiniDumpFilterMemory = 0x00000008,
 MiniDumpScanMemory = 0x00000010,
 MiniDumpWithUnloadedModules = 0x00000020,
 MiniDumpWithIndirectlyReferencedMemory = 0x00000040,
 MiniDumpFilterModulePaths = 0x00000080,
 MiniDumpWithProcessThreadData = 0x00000100,
 MiniDumpWithPrivateReadWriteMemory = 0x00000200,
 MiniDumpWithoutOptionalData = 0x00000400,
 MiniDumpWithFullMemoryInfo = 0x00000800,
 MiniDumpWithThreadInfo = 0x00001000,
 MiniDumpWithCodeSegs = 0x00002000,
 MiniDumpWithoutAuxiliaryState = 0x00004000,
 MiniDumpWithFullAuxiliaryState = 0x00008000,
 MiniDumpWithPrivateWriteCopyMemory = 0x00010000,
 MiniDumpIgnoreInaccessibleMemory = 0x00020000,
 MiniDumpWithTokenInformation = 0x00040000

 [DllImport ("DbgHelp.dll", SetLastError = true)]
 [Return: MarshalAs (UnmanagedType. Bool)]
 static extern bool MiniDumpWriteDump (
 IntPtr hProcess,
 int ProcessId,
 IntPtr hFile,
 IntPtr ExceptionParam,
 IntPtr UserStreamParam,
 IntPtr CallbackParam

 static void Main (string [] args)
 using (var process = Process. GetProcessesByName ("idaq") [0])
 using (var file = File. Open ("mem.dmp", FileMode. Create, FileAccess. Write))
 var dumpType = MINIDUMP_TYPE. MiniDumpNormal;

 if (! MiniDumpWriteDump (
 process. Handle, process. Id, file. Handle,
 dumpType, IntPtr. Zero, IntPtr. Zero, IntPtr. Zero)
 throw new Win32Exception (Marshal. GetLastWin32Error ());
Last modified: April 16, 2012



Nikhil Barar 

Can u also provide a way to trigger a crash in a C# application…??

Gilbert Fernandes 

Use this to make an app crash in C#
Note : you will have to check the “Allow Unsafe Code” in Compilation options

private unsafe void AccessViolation() // requiert /unsafe
var b = *(byte*)8762765876;

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