Trail license not working

[Aman]

I downloaded the trial version of DevCraft and am using the license key in my .NET application. Tried adding the license both ways -

- NuGet Telerik license

- Copy the script to .cs file

But I see the same error on running the application.

Could not load file or assembly 'Telerik.Licensing.Runtime, Version=1.6.31.0, Culture=neutral, PublicKeyToken=98bb5b04e55c09ef' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

[Rumen]

Hi Aman,

Could you please confirm whether you have installed the latest version of Telerik.Licensing (1.6.35) in your project?

If version 1.6.35 is already installed, please add the following bindingRedirect to the web.config file:

<runtime>
  <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
    <dependentAssembly>
      <assemblyIdentity
        name="Telerik.Licensing.Runtime"
        publicKeyToken="98bb5b04e55c09ef"
        culture="neutral" />
      <bindingRedirect
        oldVersion="0.0.0.0-1.6.35.0"
        newVersion="1.6.35.0" />
    </dependentAssembly>
  </assemblyBinding>
</runtime>

The latest Telerik UI for ASP.NET AJAX 2025.4.1210 release references Telerik.Licensing.Runtime 1.6.31 internally. However, Telerik.Licensing 1.6.35 was released one day after the AJAX release. Because of this timing gap, the runtime attempts to load version 1.6.31, while your project resolves 1.6.35, which results in the manifest mismatch error: The located assembly's manifest definition does not match the assembly reference.

Adding the bindingRedirect ensures that all older licensing runtime versions are redirected to 1.6.35, which is the correct and supported solution in this scenario.

Please let us know once you have applied the change or if the issue persists.

 

Regards,
Rumen
Progress Telerik

[Aman]

Thank you. It worked after adding the binding