Server Error in '/' Application.

Sequence contains no elements

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 no elements

Source Error:


Line 3:      Layout = "~/_Master.cshtml";
Line 4:  
Line 5:      var course = clsAPI.init().Get("courses").ID(Request["p1"].ToString()).Go().First();
Line 6:      var trainer = clsAPI.init().Get("trainer").Where("id", course.trainer_data.id).Go();
Line 7:  

Source File: c:\inetpub\wwwroot\abccerti.com\training-details.cshtml    Line: 5

Stack Trace:


[InvalidOperationException: Sequence contains no elements]
   System.Linq.Enumerable.First(IEnumerable`1 source) +417
   ASP._Page_training_details_cshtml.Execute() in c:\inetpub\wwwroot\abccerti.com\training-details.cshtml:5
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +252
   System.Web.WebPages.WebPage.ExecutePageHierarchy(IEnumerable`1 executors) +99
   System.Web.WebPages.WebPage.ExecutePageHierarchy() +185
   System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +107
   System.Web.WebPages.WebPageHttpHandler.ProcessRequestInternal(HttpContextBase httpContext) +142


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4682.0