Multiple methods of triggering a BSOD on a windows systems. WinApi.BSODManual() is recommended.

Program.cs

/* Program.cs
 * License: NCSA
 * Author: Merijn Hendriks
 */

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;

namespace TriggerBSOD
{
    /// <remarks>
    /// RtlSetProcessIsCritical, RtlAdjustPrivilege, NtRaiseHardError are undocumented NTDLL features
    /// </remarks>
    public static class WinApi
    {
        [DllImport("ntdll.dll")]
        private static extern void RtlSetProcessIsCritical(uint bNew, uint pbOld, uint bNeedScb);

        [DllImport("ntdll.dll")]
        public static extern uint RtlAdjustPrivilege(int Privilege, bool bEnablePrivilege, bool IsThreadPrivilege, out bool PreviousValue);

        [DllImport("ntdll.dll")]
        public static extern uint NtRaiseHardError(uint ErrorStatus, uint NumberOfParameters, uint UnicodeStringParameterMask, IntPtr Parameters, uint ValidResponseOption, out uint Response);

        public const uint signal = 0xc0000022;

        /// <summary>
        /// This creates a BSOD manually
        /// </summary>
        public static unsafe void BSODManual()
        {
            bool bool_0;
            uint uint_0;

            RtlAdjustPrivilege(19, true, false, out bool_0);
            NtRaiseHardError(signal, 0, 0, IntPtr.Zero, 6, out uint_0);
        }

        /// <summary>
        /// We make our process "critical" for windows to function, then kill it for BSOD.
        /// </summary>
        /// <remarks>
        /// Requires administrator privilages.
        /// </remarks>
        public static void BSODProcessSelf()
        {
            Process.EnterDebugMode();
            RtlSetProcessIsCritical(1, 0, 0);
            Process.GetCurrentProcess().Kill();
        }

        /// <summary>
        /// Kill csrss to cause BSOD
        /// </summary>
        /// <remarks>
        /// Requires administrator privilages.
        /// </remarks>
        public static void BSODProcessCSRSS()
        {
            Process.GetProcessesByName("csrss")[0].Kill();
        }
    }

    public static class Program
    {
        public static void Main()
        {
            WinApi.BSODManual();
        }
    }
}