.Net Framework Data Provider not found

I got a project to complete some 开发者_高级运维tasks on it, but when I try debug I have this error in

DbProviderFactory Dbfactory = DbProviderFactories.GetFactory(MasterConnectionProvider);

With my MasterConnectionProvider is System.Data.SqlServerCe.Entity

Unable to find the requested .Net Framework Data Provider. It may not be installed.

I check the version of sql compact installé is the same with dll 3.5.1.0

Any help please

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The DB Factory Provider name you want is:

"System.Data.SqlServerCe.3.5" 

You have - "System.Data.SqlServerCe.Entity"

i.e.

DbProviderFactory Dbfactory = DbProviderFactories.GetFactory("System.Data.SqlServerCe.3.5")

PK ;)