Question

I get objects by

IEnumerable<ObjectStateEntry> om = context.ObjectStateManager.GetObjectStateEntries(System.Data.EntityState.Modified);        

How can I get a List of the objects with a type given by a string?

Type typ = Type.GetType("mytype");
var om2 = om.Select(s => s.Entity).OfType<typ>(); // does not work

Answer 1

What you are trying to do cannot be done statically: var corresponds to the static type of the expression, while the type of your expression on the right is clearly non-static (it’s IEnumerable<T>, where T is not known before the runtime).

This, however, is legal:

var om2 = om.Select(s => s.Entity).Where(v => typ.IsInstanceOfType(v));

This would produce an IEnumerable<ObjectStateEntry>.