还是自己来回答吧
FeatureLayer lyr = mapControl1.Map.Layers["WXY"] as FeatureLayer;
IResultSetFeatureCollection irfc = (IResultSetFeatureCollection)MapInfo.Engine.Session.Current.Selections.DefaultSelection[0];
if (irfc == null)
return;
foreach (MapInfo.Data.Feature l in irfc)
{
this.label1.Text = l["Name"].ToString() + ":\\r\\n";
label1.Text += l["Sybl"].ToString();
}