C# 非托管资源释放

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace ZX.OG.ScreenShot
{
public class MemoryManagement
{
[DllImport("kernel32.dll")]
public static extern bool SetProcessWorkingSetSize(IntPtr proc, int min, int max);

public static void FlushMemory()
{
try
{
GC.Collect();
GC.WaitForPendingFinalizers();
if (Environment.OSVersion.Platform == PlatformID.Win32NT)
{
SetProcessWorkingSetSize(System.Diagnostics.Process.GetCurrentProcess().Handle, -1, -1);
}
}
catch (Exception ex)
{

}
}
}
}