public void CreateRelationship()
{
InstanceHandle keyClass = oms.GetInstance(KnownInstanceGuids.Classes.Class);
InstanceHandle keyAttribute = oms.GetInstance(KnownInstanceGuids.Classes.Attribute);
oms.BeginTransaction();
InstanceHandle keyRelationship = oms.CreateRelationshipInstance(keyClass, "has test relationship", keyAttribute);
// Class.has test relationship Attribute
oms.CreateRelationship(keyClass, keyRelationship, keyAttribute);
oms.CommitTransaction();
InstanceHandle[] keys = oms.GetRelatedInstances(keyClass, keyRelationship);
Assert.NotNull(keys);
Assert.AreEqual(1, keys.Length);
Assert.AreEqual(keyAttribute, keys[0]);
}