I'm using Visual Studio 2010 RTM with .NET/Entity Framework 4 RTM with a model driven design approach. When I create an entity with a DateTimeOffset field the EF modeler tries to map the DateTimeOffset to a SQL datetime instead of a SQL datetimeoffset. I'm using SQL Server 2008 Express so the datetimeoffset is supported in the database.
Visual Studio comes up with this error:
Error 2019: Member Mapping specified is not valid. The type 'Edm.DateTimeOffset[Nullable=False,DefaultValue=,Precision=]' of member 'Created' in type 'Data.SqlStorage.MyType' is not compatible with 'SqlServer.datetime[Nullable=False,DefaultValue=,Precision=3]' of member 'Created' in type 'Data.SqlStorage.Store.MyTypes
If I edit the type directly in the EDMX StorageModels xml section I get the following error:
Error 40: The Type datetimeoffset is not qualified with a namespace or alias. Only PrimitiveTypes can be used without qualification.
Why doesn't the modeler just correctly map this to a SQL datetimeoffset type? This problem also occured when I was still working with the beta versions of Visual Studio 2010 & .NET framework 4.