An object of type '{0}' which implements IObjectReference returned null from its GetRealObject method. Change the GetRealObject implementation to return a non-null value.
An object of type '{0}' cannot be added, attached, or removed from an EntityCollection that contains objects of type '{1}'. ...
An object of type '{0}' cannot be serialized at the top level for IXmlSerializable root type '{1}' since its IsAny setting ...
An object of type '{0}' which derives from DataContractResolver returned a null typeName or typeNamespace but not both from ...
An object of type '{0}' which derives from DataContractResolver returned false from its TryResolveType method when attempting ...
An object of type '{0}' which implements IObjectReference returned null from its GetRealObject method. Change the GetRealObject ...
An object that has a key that matches the key of the supplied object could not be found in the ObjectStateManager. Verify ...
An object was used before its deserialization callback ran, which may break higher-level consistency guarantees in the application. ...
An object with a key that matches the key of the supplied object could not be found in the ObjectStateManager. Verify that ...
An object with the same key already exists in the ObjectStateManager. The existing object is in the {0} state. An object ...