Dynamics 365 CE Plugin Exception: System.Security.SecurityException: That assembly does not allow partially trusted callers.

Today I faced an in an existing plugin which was working earlier. During investigation, I found that this is caused by the “HttpUtility.UrlEncode(clientSecret)” as shown in below code snippet image I found 2 ways to fix this issue User “System.Net.WebUtility.UrlEncode()” instead of “System.Web.HttpUtility.UrlEncode()”. Use “System.Uri.EscapeDataString() ” instead of “System.Web.HttpUtility.UrlEncode()”. as suggested in the this blog… Read More Dynamics 365 CE Plugin Exception: System.Security.SecurityException: That assembly does not allow partially trusted callers.