c# – 如何检测WinPE(4)是否已从UEFI或BIOS启动？

这会显着改变我在分区布局更改和格式时对Windows部署进行分区的方式. (GPT与MBR等)

我有一个工作,它是在PowerShell v3中修改this C++代码,但它感觉非常hack-ish：

## Check if we can get a dummy flag from the UEFI via the Kernel
## [Bool] check the result of the kernel's fetch of the dummy GUID from UEFI
## The only way I found to do it was using the C++ compiler in powershell
Function Compile-UEFIDectectionClass{
    $win32UEFICode= @'
    using System;
    using System.Runtime.InteropServices;

    public class UEFI
    {
       [DllImport("kernel32.dll")]
       public static extern UInt32 GetFirmwareEnvironmentVariableA([MarshalAs(UnmanagedType.LPWStr)] string lpName,[MarshalAs(UnmanagedType.LPWStr)] string lpGuid,IntPtr pBuffer,UInt32 nSize); 

       public static UInt32 Detect()
       {
            return GetFirmwareEnvironmentVariableA("","{00000000-0000-0000-0000-000000000000}",IntPtr.Zero,0);
       }
    }
    '@

Add-Type $win32UEFICode
}


## A Function added just to check if the assembly for 
## UEFI is loaded as is the name of the class above in C++.
Function Check-IsUEFIClassLoaded{
     return ([System.AppDomain]::CurrentDomain.GetAssemblies() | % { $_.GetTypes()} | ? {$_.FullName -eq "UEFI"}).Count 
}

## Just incase someone was to call my code without running the Compiled code run first
If (!(Check-IsUEFIClassLoaded)){
    Compile-UEFIDectectionClass
}

## The meat of the checking.
## Returns 0 or 1 ([BOOL] if UEFI or not)
Function Get-UEFI{
    return [UEFI]::Detect()
}

为了得到一个简单的旗帜,这似乎相当于顶部.
有谁知道是否有更好的方法来完成这项工作？