Could not load type 'System.Web.UI.ParseChildrenAttribute' from assembly 'System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50

Question

My ASP.NET MVC Core 3.0 application was running fine, Suddenly facing an error when I run the application.

Could not load type 'System.Web.UI.ParseChildrenAttribute' from assembly 'System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a

I'm using IIS Express and Visual Studio 2019. Error screenshot attached. enter image description here

Answer 1

Are you using CrystalReport in the asp.net core project? Currently .net core does not support System.Web.UI.ParseChildrenAttribute.

Refer to:

https://answers.sap.com/questions/13054071/is-crystal-report-support-net-core-31.html

ParseChildrenAttribute Class