WpfThreadUiDispatcher.cs

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using System;
using System.Windows;
using System.Windows.Threading;
 
namespace Dreamine.Threading.Wpf.Services;

public sealed class WpfThreadUiDispatcher : IThreadUiDispatcher
{
    private readonly Dispatcher _dispatcher;

    public Dispatcher Dispatcher => _dispatcher;

    public WpfThreadUiDispatcher()
        : this(Application.Current?.Dispatcher ?? Dispatcher.CurrentDispatcher)
    {
    }

    public WpfThreadUiDispatcher(Dispatcher dispatcher)
    {
        _dispatcher = dispatcher ?? throw new ArgumentNullException(nameof(dispatcher));
    }

    public void Invoke(Action action)
    {
        ArgumentNullException.ThrowIfNull(action);
 
        if (_dispatcher.CheckAccess())
        {
            action();
            return;
        }
 
        _dispatcher.Invoke(action);
    }

    public void BeginInvoke(Action action)
    {
        ArgumentNullException.ThrowIfNull(action);
 
        if (_dispatcher.CheckAccess())
        {
            action();
            return;
        }
 
        _dispatcher.BeginInvoke(action, DispatcherPriority.Background);
    }
}