问题描述
在MVC 4中发布表单时，我在Global.asax中遇到此错误，并且我正在努力寻找导致此问题的原因。任何帮助将不胜感激
An item with the same key has already been added.
System.ThrowHelper.ThrowArgumentException（ExceptionResource资源）：16
System.Collections.Generic.Dictionary 2.Insert(TKey key,TValue value,Boolean add) System.Collections.Generic.CollectionExtensions.ToDictionaryFast[TKey,TValue](TValue[] array,Func 2 keySelector，IEqualityComparer 1 comparer):36 System.Web.Mvc.ModelBindingContext.get_PropertyMetadata():45 System.Web.Mvc.DefaultModelBinder.BindProperty(ControllerContext controllerContext,ModelBindingContext bindingContext,PropertyDescriptor propertyDescriptor):33 System.Web.Mvc.DefaultModelBinder.BindProperties(ControllerContext controllerContext,ModelBindingContext bindingContext):46 System.Web.Mvc.DefaultModelBinder.BindComplexElementalModel(ControllerContext controllerContext,Object model):28 System.Web.Mvc.DefaultModelBinder.BindComplexModel(ControllerContext controllerContext,ModelBindingContext bindingContext):596 System.Web.Mvc.ControllerActionInvoker.GetParameterValue(ControllerContext controllerContext,ParameterDescriptor parameterDescriptor):134 System.Web.Mvc.ControllerActionInvoker.GetParameterValues(ControllerContext controllerContext,ActionDescriptor actionDescriptor):26 System.Web.Mvc.Async.AsyncControllerActionInvoker+<>c__displayClass3_1.<BeginInvokeAction>b__0(AsyncCallback asyncCallback,Object asyncState):645 System.Web.Mvc.Async.AsyncResultWrapper+WrappedAsyncResultBase 1.Begin（AsyncCallback回调，对象状态，Int32超时）：38
System.Web.Mvc.Async.AsyncControllerActionInvoker.BeginInvokeAction（ControllerContext controllerContext，字符串actionName，AsyncCallback回调，对象状态）：198
System.Web.Mvc.Controller + c.b__152_0（AsyncCallback asyncCallback，对象asyncState，ExecuteCoreState innerState）
System.Web.Mvc.Async.AsyncResultWrapper + WrappedAsyncVoid 1.CallBeginDelegate(AsyncCallback callback,Object callbackState) System.Web.Mvc.Async.AsyncResultWrapper+WrappedAsyncResultBase 1.Begin（AsyncCallback回调，对象状态，Int32超时）：38
System.Web.Mvc.Controller.BeginExecuteCore（AsyncCallback回调，对象状态）：229
System.Web.Mvc.Async.AsyncResultWrapper + WrappedAsyncResultBase 1.Begin(AsyncCallback callback,Object state,Int32 timeout):38 System.Web.Mvc.Controller.BeginExecute(RequestContext requestContext,AsyncCallback callback,Object state):156 System.Web.Mvc.MvcHandler+<>c.<BeginProcessRequest>b__20_0(AsyncCallback asyncCallback,Object asyncState,ProcessRequestState innerState):30 System.Web.Mvc.Async.AsyncResultWrapper+WrappedAsyncVoid 1.CallBeginDelegate（AsyncCallback回调，对象callbackState）
System.Web.Mvc.Async.AsyncResultWrapper + WrappedAsyncResultBase`1.Begin（AsyncCallback回调，对象状态，Int32超时）：38
System.Web.Mvc.MvcHandler.BeginProcessRequest（HttpContextBase httpContext，AsyncCallback回调，对象状态）：167
System.Web.HttpApplication + CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute（）：261
System.Web.HttpApplication.ExecuteStepImpl（IExecutionStep步骤）：100
System.Web.HttpApplication.ExecuteStep（IExecutionStep步骤，布尔值和已完成同步）：55
解决方法
暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！
如果你已经找到好的解决方法，欢迎将解决方案带上本链接一起发送给小编。
小编邮箱:dio#foxmail.com (将#修改为@）