Server Error in '/' Application.

Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

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.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

Source Error:


Line 301:                int index = posts.IndexOf(this);
Line 302:
Line 303:                return index == 0 ? posts[posts.Count - 1] : posts[index - 1];
Line 304:            }
Line 305:            else return null;

Source File: d:\home\admaiora.education\httpdocs\App_Code\BLL\Catalog\Post.cs    Line: 303

Stack Trace:


[ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index]
   System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource) +69
   System.Collections.Generic.List`1.get_Item(Int32 index) +12932753
   EMW.ACME.BLL.Catalog.Post.Prev(Statuses status, OrderByCriteria criterion) in d:\home\admaiora.education\httpdocs\App_Code\BLL\Catalog\Post.cs:303
   EMW.ACME.UI._Post.OnPreLoad(EventArgs e) in d:\home\admaiora.education\httpdocs\Post.aspx.cs:45
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +617


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