A Type Initializer Exception Thrown in the ASP.NET Core Project

Environment

Product Version	13.0.19.116 or later
Product	Progress® Telerik® Reporting
.NET Framework	.NET Core 2.1, ASP.NET Core

Description

How can I handle the The type initializer for Telerik.Reporting.Cache.Lock threw an exception error in ASP.NET Core projects?

Cause

In ASP.NET Core projects which target the .NET Core framework and if the Telerik Reporting assemblies are referred locally as References instead of NuGet packages, you may get the The type initializer for Telerik.Reporting.Cache.Lock threw an exception error.

Solution

The Telerik Reporting assemblies depend on external assemblies that get added automatically when referred from NuGet packages. When the Reporting assemblies are referenced directly, you have to add these dependencies manually.

The particular error is due to the lack of the System.Threading.AccessControl assembly. If you add it, another error related to another missing assembly will occur.

To get the list of the dependencies for Telerik.Reporting, Telerik.Reporting.Services.AspNetCore, and so on, open the packages in the NuGet Package Manager in Visual Studio.

It is strongly recommended that you add the Telerik Reporting assemblies as NuGet packages. Note that you can create a local NuGet repository and download the NuGet packages in it. If this is not an option, add the necessary dependencies manually too after checking the packages in the NuGet Package Manager as previously suggested.