public PropertyBag Copy(EPropAssoc assoc)
{
PropertyBag result = new PropertyBag();
foreach (var pd in PropEnum.EnumProps(typeof(EXilinxProjectProperties)))
{
EXilinxProjectProperties key = (EXilinxProjectProperties)pd.EnumValue;
object value;
if (pd.IDs.ContainsKey(assoc) && Properties.TryGetValue(key, out value))
result.PutProperty(key, value);
}
return result;
}