C# 为什么我'；我要离开记忆异常？

我有一个方法，我从一个计时器滴答事件中每隔X秒调用一次这个方法。 在最初的几秒钟内没有问题，但在20秒钟后，它显示异常

private void ReturnTexture(Texture texture_take, List<Point> lstPnt, float[] anglArr, float angle)
        {
            int i, j, bytes = 2048 * 512, stride = 2048;
            GraphicsStream textureStream;
            byte[] rgbValues = new byte[bytes];

            //sets texture to complete transparent
            GCHandle gch = GCHandle.Alloc(rgbValues, GCHandleType.Pinned);
            MemSet(gch.AddrOfPinnedObject(), 0x0, rgbValues.Length);

            //add 90 degrees because the cone starts at 90
            angle += 90F + 23.75F;

            //checks all points and draws yellow only those how are inside the cone
            if (lstPnt != null)
            {
                for (i = 0; i < lstPnt.Count - 1; i++)
                {
                    if (anglArr[i] <= angle && anglArr[i] >= angle - 47.5F) //if point angle is inside cone. Cone angle is 47.5 degrees
                    {
                        j = lstPnt[i].Y * stride + lstPnt[i].X * 4;

                        //yellow
                        rgbValues[j + 0] = (byte)0;
                        rgbValues[j + 1] = (byte)255;
                        rgbValues[j + 2] = (byte)255;
                        rgbValues[j + 3] = (byte)255;
                    }
                    else
                    {

                    }
                }
            }

当异常发生时，我看到变量字节包含：1048576 并且rgbValue为null

在异常发生之前，我使用了一个断点，并看到以字节为单位的值是相同的：1048576，但异常仅在20秒左右发生，而不仅仅是在开始时

Weather Radar.exe中发生“System.OutOfMemoryException”类型的未处理异常

System.OutOfMemoryException was unhandled
  HResult=-2147024882
  Message=Exception of type 'System.OutOfMemoryException' was thrown.
  Source=Weather Radar
  StackTrace:
       at Weather_Radar.Form1.ReturnTexture(Texture texture_take, List`1 lstPnt, Single[] anglArr, Single angle) in d:\C-Sharp\Weather Radar\Weather Radar\Weather Radar\Form1.cs:line 314
       at Weather_Radar.Form1.timer1_Tick(Object sender, EventArgs e) in d:\C-Sharp\Weather Radar\Weather Radar\Weather Radar\Form1.cs:line 59
       at System.Windows.Forms.Timer.OnTick(EventArgs e)
       at System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m)
       at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
       at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
       at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.Run(Form mainForm)
       at Weather_Radar.Program.Main() in d:\C-Sharp\Weather Radar\Weather Radar\Weather Radar\Program.cs:line 19
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 

表格1中的第314行是：byte[]rgbValues=新字节[bytes]

表格1中的第59行是：返回纹理（scannedCloudsTexture、cloudPoints、angleArray、angleF）

这是计时器滴答声事件代码：

static float angle_ = 0.0F;
        static float angleF = 0.0F;
        private void timer1_Tick(object sender, EventArgs e)
        {
            if (angleF > 360F)
            {
                angleF -= 360F;
            }

            ReturnTexture(scannedCloudsTexture, cloudPoints, angleArray, angleF);

            DisplayOnScreen(angle_);

            angle_ += (float)(Math.PI * 1d / 180d);
            angleF += 1.0F;
        }

---

正如Renuiz在评论中所解释的，看起来您没有释放为图像分配的内存。当您调用

GCHandle.Alloc

一个新的GCHandle，用于保护对象不被垃圾回收。当不再需要此GCHandle时，必须免费释放它

如果您不

释放
GCHandle
，您的代码分配的1MB将永远不会释放。我认为有两种可能的选择：


尽可能重复使用
字节[]
，不需要更多内存。保留
GCHandle
，这样您就可以将它们设置为0
不要使用
GCHandle
将
字节[]
固定在内存中。无论如何，当您创建一个新的
字节[]
时
GCHandle受垃圾收集器的保护，因此您应该调用GCHandle.free方法释放内存使用量，当不再需要该句柄时，我打赌RAM的每个计时器都会增加。尝试重用阵列，而不是在每个刻度上创建
static float angle_ = 0.0F;
        static float angleF = 0.0F;
        private void timer1_Tick(object sender, EventArgs e)
        {
            if (angleF > 360F)
            {
                angleF -= 360F;
            }

            ReturnTexture(scannedCloudsTexture, cloudPoints, angleArray, angleF);

            DisplayOnScreen(angle_);

            angle_ += (float)(Math.PI * 1d / 180d);
            angleF += 1.0F;
        }