One Silverlight project is a Telerik one if it has references to the RadControls for Silverlight assemblies. This is the only one indicator.
The reason why your projects "forget" that they are Telerik projects is that when you branch you break all references to the Telerik assemblies because they are specified using a relative path in each proj file.
I have two suggestions how to avoid the problem. The first is to change each Telerik assembly references to use absolute path (you can edit the proj file of the project).
The second suggestion is to copy all Telerik assemblies under the folder of your branch and reference them from this location. This way each time you branch you will branch the binaries too and no references will be broken.
I hope that the information was helpful. If any further questions arise, please write us again.
the Telerik team
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