Create boundary in C#

[humberto]

I need some translation help from vba to c#
to craeate boundary



Dim Pt As Variant, _
pstr As String, _
Msg As String


Private Sub test()


With ThisDrawing

Msg = vbCrLf & "Select an Internal Point"

Do
On Error Resume Next
Pt = .Utility.GetPoint(, Msg)
If Err Then
Err.Clear
Exit Do
End If
On Error GoTo 0

pstr = Replace(CStr(Pt(0)), ",", ".") & "," & _
Replace(CStr(Pt(1)), ",", ".")

.SendCommand Chr(3) & Chr(3) & "._-boundary" & vbCr & pstr & vbCr & vbCr

Set LastObj = .ModelSpace.Item(.ModelSpace.Count - 1)
If TypeOf LastObj Is AcadLWPolyline Then
Set objLWPolyline(0) = LastObj

End If


Loop
On Error GoTo 0


End With

MsgBox "Done"


End Sub