Checkout.cs

using System.Threading.Tasks;

namespace SourceGit.ViewModels
{
    public class Checkout : Popup
    {
        public string Branch
        {
            get;
            private set;
        }

        public Checkout(Repository repo, string branch)
        {
            _repo = repo;
            Branch = branch;
            View = new Views.Checkout() { DataContext = this };
        }

        public override Task<bool> Sure()
        {
            _repo.SetWatcherEnabled(false);
            ProgressDescription = $"Checkout '{Branch}' ...";

            return Task.Run(() =>
            {
                var succ = new Commands.Checkout(_repo.FullPath).Branch(Branch, SetProgressDescription);
                CallUIThread(() => _repo.SetWatcherEnabled(true));
                return succ;
            });
        }

        private readonly Repository _repo;
    }
}