public void TestAddOfficeSubscription()
{
//Arrange
Guid cID = clist.FirstOrDefault().ClientID;
Guid SubID = Guid.NewGuid();
//Act
Cservice.AddOfficeSubscription(cID, SubID, 10);
//Assert
Assert.AreEqual(SubID, clist.Find(c => c.ClientID == cID).ClientSubscriptions.FirstOrDefault().SubscriptionID);
Assert.AreEqual(10, clist.Find(c => c.ClientID == cID).ClientSubscriptions.FirstOrDefault().UsersPerSubscription);
}