using System;
using System.Diagnostics;
using System.Threading.Tasks;

public static class DisplayFusionFunction
{
    static Task<int> Test()
    {
        var tcs = new TaskCompletionSource<int>();
    
        var process = new Process {
            StartInfo = {
                FileName = "timeout",
                Arguments = "1"
            },
            EnableRaisingEvents = true
        };
    
        process.Exited += (sender, args) => {
            tcs.SetResult(process.ExitCode);
            process.Dispose();
        };
    
        try
        {
            process.Start();
        }
        catch
        {
            return Task.FromResult(-1);
        }
    
        return tcs.Task;
    }
    
    public static async void Run(IntPtr windowHandle)
    {
        await Test();
        System.Windows.Forms.MessageBox.Show("Successfully completed!");
    }
}