转移.net core 3.1，为.NET 5做准备

Infrastructure/Utilities/DynamicPropertyBag .cs

@@ -0,0 +1,43 @@
+using System.Collections.Generic;
+using System.Dynamic;
+using System.IO;
+
+namespace Infrastructure.Utilities
+{
+  /// <summary>
+  /// 动态属性Bag
+  /// </summary>
+  public class DynamicPropertyBag : DynamicObject
+  {
+    private Dictionary<string, object> storage = new Dictionary<string, object>();
+
+    public override bool TryGetMember(GetMemberBinder binder, out object result)
+    {
+      if (storage.ContainsKey(binder.Name))
+      {
+        result = storage[binder.Name];
+        return true;
+      }
+      result = null;
+      return false;
+    }
+
+    public override bool TrySetMember(SetMemberBinder binder, object value)
+    {
+      string key = binder.Name;
+      if (storage.ContainsKey(key))
+        storage[key] = value;
+      else
+        storage.Add(key, value);
+      return true;
+    }
+
+    public override string ToString()
+    {
+      StringWriter message = new StringWriter();
+      foreach (var item in storage)
+        message.WriteLine("{0}:\t{1}", item.Key, item.Value);
+      return message.ToString();
+    }
+  }
+}