如何以编程方式获取(ASP).NET应用程序的总分配内存？

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

public class MemoryInfo
{
    [DllImport("kernel32.dll", SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    static extern bool GetProcessMemoryInfo(IntPtr hProcess, out PROCESS_MEMORY_COUNTERS_EX counters, uint size);

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
    public struct PROCESS_MEMORY_COUNTERS_EX
    {
        public uint cb;
        public uint PageFaultCount;
        public UIntPtr PeakWorkingSetSize;
        public UIntPtr WorkingSetSize;
        public UIntPtr QuotaPeakPagedPoolUsage;
        public UIntPtr QuotaPagedPoolUsage;
        public UIntPtr QuotaPeakNonPagedPoolUsage;
        public UIntPtr QuotaNonPagedPoolUsage;
        public UIntPtr PagefileUsage;
        public UIntPtr PeakPagefileUsage;
        public UIntPtr PrivateUsage;
    }

    public static ulong GetTotalAllocatedMemory()
    {
        var process = Process.GetCurrentProcess();
        var processHandle = process.Handle;
        var counters = new PROCESS_MEMORY_COUNTERS_EX();
        GetProcessMemoryInfo(processHandle, out counters, (uint)Marshal.SizeOf(counters));
        return (ulong)counters.PrivateUsage;
    }
}