Sample Code for DGN to STP C# Conversion. Use API example Code for batCh DGN files to STP Conversion within VB.NET, Asp.NET or any .NET based appliCation....DGN STP Convert DGN to STP via C# Instantly convert DGN to STP...How to Convert DGN to STP Using C# In order to convert DGN to STP...