Public Overridable Sub Clear() 

Dim instance As GroupInfoCollection
 
instance.Clear()

public virtual void Clear()

fpSpread1.AllowColumnMove = true;
fpSpread1.ActiveSheet.GroupBarInfo.Visible = true;
fpSpread1.ActiveSheet.AllowGroup = true;

FarPoint.Win.Spread.GroupInfo gi = new FarPoint.Win.Spread.GroupInfo();
gi.BackColor = Color.Yellow;

FarPoint.Win.Spread.GroupInfo gi2 = new FarPoint.Win.Spread.GroupInfo();
gi2.BackColor = Color.Green;

FarPoint.Win.Spread.GroupInfoCollection gic = new FarPoint.Win.Spread.GroupInfoCollection();
gic.AddRange(new FarPoint.Win.Spread.GroupInfo[] {gi, gi2});

fpSpread1.ActiveSheet.GroupInfos.Add(gic[0]);

if ((gic.Count > 2)) {
    gic.Clear();
}

FpSpread1.AllowColumnMove = True
FpSpread1.ActiveSheet.GroupBarInfo.Visible = True
FpSpread1.ActiveSheet.AllowGroup = True

Dim gi As New FarPoint.Win.Spread.GroupInfo
gi.BackColor = Color.Yellow

Dim gi2 As New FarPoint.Win.Spread.GroupInfo
gi2.BackColor = Color.Green

Dim gic As New FarPoint.Win.Spread.GroupInfoCollection()
gic.AddRange(New FarPoint.Win.Spread.GroupInfo() {gi, gi2})

FpSpread1.ActiveSheet.GroupInfos.Add(gic(0))

If gic.Count > 2 Then
      gic.Clear()
End If