在这种情况下，我应该在 CreateDC 之后使用 DeleteDC

我有以下代码

public static class GammaRamp
{
        [DllImport("gdi32.dll")]
        private unsafe static extern bool SetDeviceGammaRamp(Int32 hdc, ushort* ramp);
        [DllImport("gdi32.dll")]
        public static extern IntPtr CreateDC(string lpszDriver, string lpszDevice, string lpszOutput, IntPtr lpInitData);

        private static Int32 hdc;
        //some other things

       public static unsafe void SetGammaRamp(int aBrightness, int aTemperature)
       {
            //...some other things calculating rgbArray but not important for the question

            foreach (System.Windows.Forms.Screen screen in System.Windows.Forms.Screen.AllScreens)
            {
                //Get the hardware device context of the screen
                hdc = CreateDC(screen.DeviceName, null, null, IntPtr.Zero).ToInt32();
                SetDeviceGammaRamp(hdc, rgbArray);
            }
       }
}

将 CreateDC 结果转换为 ToInt32 而不是保留它 IntPtr 然后调用 DeleteDC 是一种好习惯。我应该在 CreateDC 之后使用 DeleteDC 方法，但这是否必须在我的代码中？我希望这段代码不会出现某种内存问题。