修改了logwindows输出，避免高频输出时卡死。修改了流程运行上下文，使节点具备终止分支运行的能力。

WorkBench.Remote/Node/View/ExpOpNodeControl.xaml.cs

@@ -0,0 +1,24 @@
+using Serein.NodeFlow.Model;
+using Serein.WorkBench.Node.ViewModel;
+
+namespace Serein.WorkBench.Node.View
+{
+    /// <summary>
+    /// ExprOpNodeControl.xaml 的交互逻辑
+    /// </summary>
+    public partial class ExpOpNodeControl : NodeControlBase
+    {
+        public ExpOpNodeControl() : base()
+        {
+            // 窗体初始化需要
+            ViewModel = new ExpOpNodeViewModel(new SingleExpOpNode());
+            DataContext = ViewModel;
+            InitializeComponent();
+        }
+        public ExpOpNodeControl(ExpOpNodeViewModel viewModel) :base(viewModel)
+        {
+            DataContext = viewModel;
+            InitializeComponent();
+        }
+    }
+}