Could not Find Assembly Telerik.Licensing.Runtime Compile Error After Upgrade

Environment

Product Version	2025.1.211
Product	UI for WPF

Description

An error occurs after upgrade that the Telerik.Licensing.Runtime assembly cannot be found. The error message is something like this:

Unknown build error, 'Could not find assembly 'Telerik.Licensing.Runtime, Version=1.4.6.0, Culture=neutral, PublicKeyToken=tokenhere'. Either explicitly load this assembly using a method such as LoadFromAssemblyPath() or use a MetadataAssemblyResolver that returns a valid assembly.

This may happen if you upgrade to 2025 Q1 from an older version. With 2025 Q1, a new licensing mechanism was introduced, which requires you to reference the Telerik.Licensing.Runtime dll.

Solution

To resolve the error, reference the Telerik.Licensing.Runtime.dll file in the project or install the Telerik.Licensing NuGet package.

If you install the Telerik UI for WPF assemblies using NuGet packages, the Telerik.Licensing package is installed automatically and you should not see the beforementioned error.