Viv,

To be honest I guessed :-) however of the top of my head - the TypeConverter has methods to check for the types its supports conversion from and to ie. CanConvertFrom(typeof(string)) or CanConvertTo(typeof(string)).

I suppose you could do something like the following:-

Size test = new Size();
MessageBox.Show(TypeDescriptor.GetConverter(test).ConvertToString(test));

Which should display the string to use, or you could do something like this:-

foreach(Color c in TypeDescriptor.GetConverter(typeof(Color)).GetStandardValues()) 
{
   MessageBox.Show(TypeDescriptor.GetConverter(c).ConvertToString(c));
}

Regards
Neil