WPF没有提供任何功能来移除窗体上的icon图标。一般的做法是设置一个空白的图标，如下图1:

比较好的做法是使用Win32API提供的函数来移除这个图标。使用如下的代码：

public static class IconHelper    {        [DllImport("user32.dll")]        static extern int GetWindowLong(IntPtr hwnd, int index);        [DllImport("user32.dll")]        static extern int SetWindowLong(IntPtr hwnd, int index, int newStyle);        [DllImport("user32.dll")]        static extern bool SetWindowPos(IntPtr hwnd, IntPtr hwndInsertAfter,                   int x, int y, int width, int height, uint flags);        [DllImport("user32.dll")]        static extern IntPtr SendMessage(IntPtr hwnd, uint msg,                   IntPtr wParam, IntPtr lParam);        const int GWL_EXSTYLE = -20;        const int WS_EX_DLGMODALFRAME = 0x0001;        const int SWP_NOSIZE = 0x0001;        const int SWP_NOMOVE = 0x0002;        const int SWP_NOZORDER = 0x0004;        const int SWP_FRAMECHANGED = 0x0020;        const uint WM_SETICON = 0x0080;        public static void RemoveIcon(Window window)        {            //获取窗体的句柄            IntPtr hwnd = new WindowInteropHelper(window).Handle;            //改变窗体的样式            int extendedStyle = GetWindowLong(hwnd, GWL_EXSTYLE);            SetWindowLong(hwnd, GWL_EXSTYLE, extendedStyle | WS_EX_DLGMODALFRAME);            //更新窗口的非客户区，以反映变化            SetWindowPos(hwnd, IntPtr.Zero, 0, 0, 0, 0, SWP_NOMOVE |                  SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED);        }    }

protected override void OnSourceInitialized(EventArgs e)        {            IconHelper.RemoveIcon(this);        }