public IPrim this[string name] {
get {
if (!PrimExists(name))
{
throw new Exception("Unable to look up primitive. " + name + " does not resolve to a known primitive.");
}
IEnumerable <IPrim> primsWithName = _prims.Where(prim => prim.Name.Equals(name));
if (primsWithName.Count() > 1)
{
throw new Exception("Unable to look up primitive. The are more than one primitives called " + name + ". Use GetPrimsWithName() instead.");
}
return(primsWithName.First());
}
}