Change Description of Breakline Set

[binhnguyen1202]

Hi guy.
I'm trying to add a breakline in a Tin surface using menthod 
tinSurface.BreaklinesDefinition.AddStandardBreaklines(new ObjectIdCollection(featureLineId), 0.1, 5, 5, 0);
I would like to change the Description of Breakline Set by feature name. I can't do this by COM but I would like to change to .Net.
This menthod in COM can add a description:
surface.Breaklines.AddStandardBreakline(idArray, "BreaklineByPoints", midordinate);
I appreciate if someone can help me.
Thanks

[Jeff_M · Accepted solution]

var brkdef = tinSurface.BreaklinesDefinition.AddStandardBreaklines(new ObjectIdCollection(featureLineId), 0.1, 5, 5, 0);
brkdef.Description = "BreaklineByPoints";

[binhnguyen1202]

Thank for your help@Jeff_M
It works for me.