I'm using Telerik.Web.UI Version 2020.2.617
I have integrated it and added a reference in my web application, asked me to upgrade the version of Assemblies "System.Web.Extension.dll" and "System.Core.dll" has to be upgraded to version 4.0, I did that too, Now I'm getting an error while I'm running or doing build "The type or namespace name 'Script' does not exist in the namespace 'System.Web' (are you missing an assembly reference?)", Assembly it is referring to "System.Web.Script.Services", same error is coming for other attributes like "ScriptMethod, ScriptMethodAttribute"
For the Key word "this" it is throwing as below error
It is throwing an error for "System.Linq.Expressions"
Can anyone help me out on this how to resolve these bugs.
P L P Kumar