private XElement GetInstanceCountElementForRole(string roleName)
{
XElement role = OriginalVersion.Descendants(Namespaces.NsServiceManagement + "Role")
.FirstOrDefault(a => (string)a.Attribute("name") == roleName);
// updates the instance count number here
return role.Elements(Namespaces.NsServiceManagement + "Instances")
.FirstOrDefault();
}