The WPF Settings Class Library project is a startup item, which sets the form to follow.

Original: WPF sets the class library project as a startup item and sets the form to follow.

1. To add the class Program.cs for startup, a static main function entry is required.

using System;using System.Windows;using System.Windows.Controls;

The brown part implements the position of the window fixed and follows.

public class Program {private static application _mainapplication; Internal static application MainApplication {get {return _mainapplication?? (_mainapplication = new Application ()); }} [STAThread] public static void Main (string[] args) {var mainwin = new Window ()            ; var Followwin = new Window ();//lambda expression mainwin.loaded + = (s, e) + = {Followwin.windo                    Wstartuplocation = windowstartuplocation.manual;                    Followwin.left = Mainwin.left + mainwin.width;                    Followwin.top = Mainwin.top;                Followwin.show (); };            //Occurs when the window position changes mainwin.locationchanged + = (s, e) + = {Fol                    Lowwin.left = Mainwin.left + mainwin.width;                Followwin.top = Mainwin.top; };Mainapplication.shutdownmode = Shutdownmode.onexplicitshutdown;        Mainapplication.run (Touch); }    }

2. Set the output type of the class library project to "Windows Application":

3. Set the Startup object to the program created in the first step

4, the operation can be.

The WPF Settings Class Library project is a startup item, which sets the form to follow.