Question about use of System.ComponentModel.Composition.dll

[Carles]

Hi,

I started using the RichTextBox component in our WPF Application and I found an issue regarding the version of the System.ComponentModel.Composition.dll which is being used by the control.

If I use the one that comes inside the Q1 2011 binaries package(version 2009.7.8), the control works fine. The problem is that I'm already using the same dll provided by .NET Framework 4.0(version 4.0.30319.1) in my project which produces a crash regarding wrong dll version when the control tries to load.

Which is the reason why the control is using this "personalized" dll? I see that the size of both dll is different too so I assume that the one that comes with the controls has some modifications. Do I have any workaround to deal with this issue??

Hope you can help me with this problem.

Thanks and Regards,

Carles

[Iva Toteva]

Hi Carles,

The System.ComponentModel.Composition.dll of version 2009.7.8 is released with the WPF 3.5 version of the controls, as in .NET framework 3.5 there is no System.ComponentModel.Composition assembly. As RadRichTextBox uses MEF for loading the pop-ups that it uses and format providers, we had to implement an equivalent for WPF 3.5.
If your project targets .NET framework 4.0, you should be using the dlls that have been built for WPF 4 and adding a reference to this Composition assembly would not be required. There are separate zips with hotfix dlls and installers for WPF 3.5 and WPF 4, which you can download from your account.

Regards,
Iva
the Telerik team

[Carles]

Hi Iva,

Thanks for the answer. That solved my problem.

Regards,

Carles

[Gomathi]

Hi,
    I am using .net frame work 3.5.I have tried to include System.ComponentModel.Composition.dll from

MEF_Preview_6 2009.7.8.0 (Final)  2009, Aug 28(http://labs.ashmind.com/reuse/library/system.componentmodel.composition).
While including dll i am getting error as "You cannot add a reference to System.ComponentModel.Composition.dll as it was not build runtime.Silverlight Projects will only work with Silverlight assemblish"

[Andrew]

Hi Gomathi,

This usually happens when you are trying to add an assembly built against the .NET framework runtime to a Silverlight project. Try using the the assembly with the same name built for Silverlight.

All the best,
Andrew
the Telerik team