added runtime patcher, added MemoryUtils, fixes

WeModPatcher/ReactiveUICore/RelayCommand.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Windows.Input;
+
+namespace WeModPatcher.ReactiveUICore
+{
+    public sealed class RelayCommand : ICommand
+    {
+        private readonly Action<object> _execute;
+        private readonly Func<object, bool> _canExecute;
+
+        public event EventHandler CanExecuteChanged
+        {
+            add    => CommandManager.RequerySuggested += value;
+            remove => CommandManager.RequerySuggested -= value;
+        }
+
+        public RelayCommand(Action<object> execute, Func<object, bool> canExecute = null)
+        {
+            _execute = execute;
+            _canExecute = canExecute;
+        }
+
+        public bool CanExecute(object parameter) => _canExecute == null || _canExecute(parameter);
+        public void Execute(object parameter)    => _execute(parameter);
+    }
+}