I have a web project build on .net framework 4.5.1. We are trying to added PostgreSQL support for the project. Using Nuget, I have installed 4.0.4 npgsql to the project. Under references, I see the following being added to the project.
When I tried run the project and connect and get the data from the database, I am getting the following error saying FileNotFoundException:
System.TypeInitializationException
HResult=0x80131534
Message=The type initializer for 'com.rsol.RConfig' threw an exception.
Source=RConfig
StackTrace:
at com.rsol.RConfig.getInstance() in C:\Workspaces\PS\RConfig\RConfig.cs:line 1113
at RAdmin.Global.Application_Start(Object sender, EventArgs e) in C:\Workspaces\PS\RAdmin\Global.asax.cs:line 528
Inner Exception 1:
TypeInitializationException: The type initializer for 'com.rsol.Db.DbMgr' threw an exception.
Inner Exception 2:
FileNotFoundException: Could not load file or assembly 'System.Threading.Tasks.Extensions, Version=4.2.0.1, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. The system cannot find the file specified.
Inner Exception 3:
FileNotFoundException: Could not load file or assembly 'System.Threading.Tasks.Extensions, Version=4.2.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. The system cannot find the file specified.
System.Threading.Tasks.Extensions which is installed using Nuget is not getting loaded to the project. When I checked the properties of System.Threading.Tasks.Extensions reference, the dll file exists in the location. I have also tried installing System.Threading.Tasks.Extensions.dll file to assembly using gacutil. I am still getting the same error.
Please let me know if you need any additional information.
Any help is really appreciated.
Update Nuget Package
https://www.nuget.org/packages/System.Threading.Tasks.Extensions/
will solve your problem
In my case this "update" solved the problem, but I had to downgrade it.