set-lock-screen.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Threading.Tasks;
using Windows.Storage.Streams;
using Windows.System.UserProfile;
using Windows.Storage;
using System.Security.AccessControl;

namespace set_lock_screen
{
    class Program
    {
        static async Task SetLockImage(string path)
        {
            StorageFile file = await StorageFile.GetFileFromPathAsync(path);
            await LockScreen.SetImageFileAsync(file);
        }

        static int Main(string[] args)
        {
            if (args.Length != 1)
            {
                Console.Error.WriteLine("usage: {0} <image>", Environment.GetCommandLineArgs()[0]);
                return 1;
            }
            try
            {
                SetLockImage(Path.GetFullPath(args[0])).GetAwaiter().GetResult();
                return 0;
            }
            catch (Exception ex)
            {
                Console.Error.WriteLine("Error: {0}", ex.Message);
                return 2;
            }
        }
    }
}