- 优化 实体基类的属性位置，优先排在最前面； #164

- 整理 实体类 Ctor 有构造函数的映射处理；#164 [wiki](https://github.com/2881099/FreeSql/wiki/%e8%bf%94%e5%9b%9e%e6%95%b0%e6%8d%ae#dto-%E6%98%A0%E5%B0%84%E6%9F%A5%E8%AF%A2)
- 优化 实体属性，支持 protected set 属性；#164

FreeSql.DbContext/Extensions/DependencyInjection.cs

@@ -15,7 +15,7 @@ namespace FreeSql
                 DbContext ctx = null;
                 try
                 {
-                    var ctor = dbContextType.GetConstructors().FirstOrDefault();
+                    var ctor = dbContextType. GetConstructors().FirstOrDefault();
                     var ctorParams = ctor.GetParameters().Select(a => sp.GetService(a.ParameterType)).ToArray();
                     ctx = Activator.CreateInstance(dbContextType, ctorParams) as DbContext;
                 }