Server Error in '/' Application.

Sequence contains more than one element

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: Sequence contains more than one element

Source Error:


Line 15:                 <div class="block-content">
Line 16:                     <ul class="items @ViewBag.Uyelik">
Line 17:                         <li><a href="/@LanguageTextHeadings.Where(x=>x.Code=="Yeni Üyelik").Select(x=>x.Url).SingleOrDefault()"><i class="fa fa-angle-double-right"></i><span> @LanguageTextHeadings.Where(x => x.Code == "Yeni Üyelik").Select(x => x.Name).SingleOrDefault()</span></a></li>
Line 18:                         <li><a href="/@LanguageTextHeadings.Where(x=>x.Code=="Üye Girişi").Select(x=>x.Url).SingleOrDefault()"><i class="fa fa-angle-double-right"></i><span> @LanguageTextHeadings.Where(x => x.Code == "Üye Girişi").Select(x => x.Name).SingleOrDefault()</span></a></li>
Line 19:                         <li><a href="/@LanguageTextHeadings.Where(x=>x.Code=="Şifremi Unuttum").Select(x=>x.Url).SingleOrDefault()"><i class="fa fa-angle-double-right"></i><span> @LanguageTextHeadings.Where(x => x.Code == "Şifremi Unuttum").Select(x => x.Name).SingleOrDefault()</span></a></li>

Source File: C:\Inetpub\vhosts\onkagrup.com.tr\httpdocs\Views\Site\Links.cshtml    Line: 17

Stack Trace:


[InvalidOperationException: Sequence contains more than one element]
   System.Linq.Enumerable.SingleOrDefault(IEnumerable`1 source) +470
   ASP._Page_Views_Site_Links_cshtml.Execute() in C:\Inetpub\vhosts\onkagrup.com.tr\httpdocs\Views\Site\Links.cshtml:17
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +252
   System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +148
   System.Web.WebPages.StartPage.ExecutePageHierarchy() +86
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +107
   System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +378
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +91
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList`1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) +795
   System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +81
   System.Web.Mvc.Async.<>c__DisplayClass3_1.<BeginInvokeAction>b__5(IAsyncResult asyncResult) +188
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +38
   System.Web.Mvc.<>c.<BeginExecuteCore>b__152_1(IAsyncResult asyncResult, ExecuteCoreState innerState) +29
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +73
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +52
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +39
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +38
   System.Web.Mvc.<>c.<BeginProcessRequest>b__20_1(IAsyncResult asyncResult, ProcessRequestState innerState) +43
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +73
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +38
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +431
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +75
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +158


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4700.0