DOTNET Entity Version Issue

Hi Folks,

Recently we changed the dotnet solution set to 4.5 version while i am testing the newly created dotnet adapter service from the latest dlls i am getting the following error

our WM is 9.5
dot net clr version is 4.5
installed dotnet framework 4.5 also com.wm.dotnet.pkg.WmDotNetException: ErrorId:1401, Reasons:Unable to invoke the method in the specified assembly., DetailErrorId:7001, DetailMessage:Exception has been thrown by the target of an invocation

Please help on resolving this