C# console application icon

You can change it in the project properties.

See this Stack Overflow article: Is it possible to change a console window's icon from .net?

To summarize right click on your project (not the solution) in Visual Studio and select properties. At the bottom of the "Application" tab there is a section for "Icon and manifest" where you can change the icon.

You can't specify an executable's icon in code - it's part of the binary file itself.

From the command line you'd use /win32icon:<file> if that's any help, but you can't specify it within the code of the application. Don't forget that most of the time the application's icon is displayed, your app isn't running at all!

That's assuming you mean the icon for the file itself in explorer. If you mean the icon of the application while it's running if you just double-click the file, I believe that will always just be the icon for the console itself.

Here is a solution to change icon by code:

class IconChanger
{
    public static void SetConsoleIcon(string iconFilePath)
    {
        if (Environment.OSVersion.Platform == PlatformID.Win32NT)
        {
            if (!string.IsNullOrEmpty(iconFilePath))
            {
                System.Drawing.Icon icon = new System.Drawing.Icon(iconFilePath);
                SetWindowIcon(icon);
            }
        }
    }
    public enum WinMessages : uint
    {
        /// <summary>
        /// An application sends the WM_SETICON message to associate a new large or small icon with a window. 
        /// The system displays the large icon in the ALT+TAB dialog box, and the small icon in the window caption. 
        /// </summary>
        SETICON = 0x0080,
    }

    [System.Runtime.InteropServices.DllImport("user32.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto)]
    private static extern IntPtr SendMessage(IntPtr hWnd, int Msg, int wParam, IntPtr lParam);


    private static void SetWindowIcon(System.Drawing.Icon icon)
    {
        IntPtr mwHandle = System.Diagnostics.Process.GetCurrentProcess().MainWindowHandle;
        IntPtr result01 = SendMessage(mwHandle, (int)WinMessages.SETICON, 0, icon.Handle);
        IntPtr result02 = SendMessage(mwHandle, (int)WinMessages.SETICON, 1, icon.Handle);
    }// SetWindowIcon()
}