electron removed

WeModPatcher/ReactiveCore/AsyncRelayCommand.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Windows.Input;
+
+namespace WeModPatcher.ReactiveCore
+{
+    public sealed class AsyncRelayCommand : ICommand
+    {
+        private readonly Func<object, Task> _execute;
+        private readonly Func<object, bool> _canExecute;
+
+        private long _isExecuting;
+
+        public AsyncRelayCommand(Func<object, Task> execute, Func<object, bool> canExecute = null)
+        {
+            this._execute = execute;
+            this._canExecute = canExecute ?? (o => true);
+        }
+
+        public event EventHandler CanExecuteChanged
+        {
+            add => CommandManager.RequerySuggested += value;
+            remove => CommandManager.RequerySuggested -= value;
+        }
+
+        private static void RaiseCanExecuteChanged() => CommandManager.InvalidateRequerySuggested();
+        
+        public bool CanExecute(object parameter) => Interlocked.Read(ref _isExecuting) == 0 && _canExecute(parameter);
+
+        public async void Execute(object parameter)
+        {
+            Interlocked.Exchange(ref _isExecuting, 1);
+            RaiseCanExecuteChanged();
+
+            try
+            {
+                await _execute(parameter);
+            }
+            finally
+            {
+                Interlocked.Exchange(ref _isExecuting, 0);
+                RaiseCanExecuteChanged();
+            }
+        }
+    }
+}