References are disappeared permanently

when editing sitefinity project in VS .Net 2010 References are disappeared permanently,
also message of can not load Telerik.Web.Design.dll is appeared and many other dlls also.
what i do right now i copy the missed or not loaded dlls from another project.
Please clarify  that to me.

although I do not have an explanation as to why this happens, I know that one of the causes is if you use a "Rebuild" instead of a "Build" in visual studio. I use "Build" exclusively and never receive this issue.

After rebuild stile some references not loaded
like
1-  'Microsoft.IdentityModel
2- Telerik.Web.UI
3 - Telerik.Sitefinity.Analytics .*
4- Telerik.Sitefinity.Utilities
5- Microsoft.Practices.ServiceLocation
.....   and more
can sitefinity people reply to me please

Hello Hosam,

The project references will disappear if you hit rebuild for the project. Rebuild does a complete recompile of whatever you select and you will most likely get the error: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.

However, the build action is incrеmentаl. It will rеcompilе thе bits thаt hаvе chаngеd, and in a multi-project solution will rеbuild оnly projects affectеd by the mоst recent change.

Therefore you will have to add all needed references to your project  again and the errors will disappear.

Greetings,
Victor Velev
the Telerik team

Victor,

I have added all resources back into the project and yet still the server still just tells me that the server is restarting.

Hi Ian,

Can you elaborate a bit more on your particular situation regarding the message? When did you start to see it? Have you removed all references, cleaned and then added them all back to build the solution?

Kind regards,
Victor Velev
the Telerik team