region 内存回收

    [DllImport("kernel32.dll", EntryPoint = "SetProcessWorkingSetSize")]
    public static extern int SetProcessWorkingSetSize(IntPtr process, int minSize, int maxSize);
    /// <summary>
    /// 释放内存
    /// </summary>
    public static void ClearMemory()
    {
        GC.Collect();
        GC.WaitForPendingFinalizers();
        if (Environment.OSVersion.Platform == PlatformID.Win32NT)
        {
            FormMain.SetProcessWorkingSetSize(System.Diagnostics.Process.GetCurrentProcess().Handle, -1, -1);
        }
    }
    #endregion

C# 垃圾回收释放内存

原文：https://www.cnblogs.com/jiajinling/p/8862112.html