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    <p>You'll have to create a Console window manually before you actually call any Console.Write methods. That will init the Console to work properly without changing the project type (which for WPF application won't work).</p> <p>Here's a complete source code example, of how a ConsoleManager class might look like, and how it can be used to enable/disable the Console, independently of the project type.</p> <p>With the following class, you just need to write <code>ConsoleManager.Show()</code> somewhere before any call to <code>Console.Write</code>...</p> <pre><code>[SuppressUnmanagedCodeSecurity] public static class ConsoleManager { private const string Kernel32_DllName = "kernel32.dll"; [DllImport(Kernel32_DllName)] private static extern bool AllocConsole(); [DllImport(Kernel32_DllName)] private static extern bool FreeConsole(); [DllImport(Kernel32_DllName)] private static extern IntPtr GetConsoleWindow(); [DllImport(Kernel32_DllName)] private static extern int GetConsoleOutputCP(); public static bool HasConsole { get { return GetConsoleWindow() != IntPtr.Zero; } } /// &lt;summary&gt; /// Creates a new console instance if the process is not attached to a console already. /// &lt;/summary&gt; public static void Show() { //#if DEBUG if (!HasConsole) { AllocConsole(); InvalidateOutAndError(); } //#endif } /// &lt;summary&gt; /// If the process has a console attached to it, it will be detached and no longer visible. Writing to the System.Console is still possible, but no output will be shown. /// &lt;/summary&gt; public static void Hide() { //#if DEBUG if (HasConsole) { SetOutAndErrorNull(); FreeConsole(); } //#endif } public static void Toggle() { if (HasConsole) { Hide(); } else { Show(); } } static void InvalidateOutAndError() { Type type = typeof(System.Console); System.Reflection.FieldInfo _out = type.GetField("_out", System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic); System.Reflection.FieldInfo _error = type.GetField("_error", System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic); System.Reflection.MethodInfo _InitializeStdOutError = type.GetMethod("InitializeStdOutError", System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic); Debug.Assert(_out != null); Debug.Assert(_error != null); Debug.Assert(_InitializeStdOutError != null); _out.SetValue(null, null); _error.SetValue(null, null); _InitializeStdOutError.Invoke(null, new object[] { true }); } static void SetOutAndErrorNull() { Console.SetOut(TextWriter.Null); Console.SetError(TextWriter.Null); } } </code></pre>
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    1. USJohn Leidegren
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    1. COI like this, it works, & I can use this in other projects. However because it launches a new console window it causes an issue with a current project. If I pass in command line options would like to be able to output to the console that it was launched from so the user gets the output there. In my app if command line options are provided it stays a console app and then does its work and then exits. This allows for the app to be automated and schedule to do tasks, or the user can just do something quickly and get out. However I want to output some things , like the help usage stuff, etc.
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      1. USRodney S. Foley
    2. CONice hack with setting the _out and _error to null. Smart!
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    3. COIs it possible to embed the console window within a WPF window using this or any other technique?
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      1. USInfinitiesLoop
 

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