Pass Command Line Arguments/Parameters to a WPF Application

Passing parameters from the command line to a WPF application is not as straightforward as doing the same in WinForms. It's a multiple step process, which I've detailed below.

1. Edit the app.xaml.cs like this:
   

     using System;
     using System.Collections.Generic;
     using System.Configuration;
     using System.Data;
     using System.Linq;
     using System.Windows;
     
     namespace Tool
     {
         /// <summary>
         /// Interaction logic for App.xaml
         /// </summary>
         public partial class App : Application
         {
             public static string[] args;
     
             void OnStartUp(object sender, StartupEventArgs e)
             {
                 if (e.Args.Length > 0)
                 {
                     args = e.Args;
                 }
             }
         }
     }
   

2. Edit the app.xaml like this:
   

     <Application x:Class="Tool.App"
                  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                  StartupUri="MainWindow.xaml" Startup="OnStartUp">
         <Application.Resources>
              
         </Application.Resources>
     </Application>
   

3. Edit MainWindow.xaml.cs like this:
   

    public MainWindow()
    {
        InitializeComponent();
        
        if (App.args != null && App.args.Length > 0)
        {
          //Do Something here with Command Line Arguments/Parameters
        }
        
    }
   

Remember that you can pass paremeters/arguments from visual studio for debugging purposes.

1. Right Click on Project and Select Properties.
2. Go to Debug tab.
3. Set Command Line arguments, see screenshot below.