public void Remove(SchemaType type)
 {
     _Types.Remove(type.PersistentName);
 }
 public ArrayType UseArray(SchemaType elementType)
 {
     return((ArrayType)_UseOrCreate(new ArrayType(this, elementType)));
 }
 public DictionaryType UseDictionary(SchemaType key, SchemaType val)
 {
     return((DictionaryType)_UseOrCreate(new DictionaryType(this, key, val)));
 }