Is there possibility and need to use versioning of entity objects in order to have different versions of entities
and to put

int _version;

public int Version
{
get { return _version; }
set { _version = value; }
}

into EntityBase


For example if we have to transfer from one version of software to next
and there is period when two versions must work simultaneously.

What about changes in domain with properties of entiteies (no mater are they value objects or collection of entities).