public ProjectionDefinition<TSource, TProjection> Expression<TProjection>(
	Expression<Func<TSource, TProjection>> expression
)

Public Function Expression(Of TProjection) ( 
	expression As Expression(Of Func(Of TSource, TProjection))
) As ProjectionDefinition(Of TSource, TProjection)

member Expression : 
        expression : Expression<Func<'TSource, 'TProjection>> -> ProjectionDefinition<'TSource, 'TProjection>