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Using Entity Framework Code First, the web application crashes on a call to DbContext with the following error:
Assertion failed
Expression: primitiveType != null
Description: Assertion failed: primitiveType != null
It crashes on the following line of code:
public class MyDb : DbContext {
which is called by:
MyDb _db = new MyDb();
So it seams like calling DbContext generates a fatal error. DbContext is an EF function and I cannot debug inside EntityFramework.dll
It’s a problem related to older versions of EntityFramework. It happens sometimes when copying a Visual Studio Project to a different machine. This can cause the application to calculate a different ModelHash than the one that is in the database (inside the EdmMetaData table). Solution is to delete the EdmMetaData table and use
DbDatabase.SetInitializer<MyContext>( new DropCreateDatabaseIfModelChanges<MyContext>());to put it back in place, or even better: Upgrade to a newer version of EntityFramework that is not utilizing the EdmMetaData table and ModelHashes.