I have added this request to the tracker and have implemented it:
Issue 2438 – Allow assigning null to Session.SessionLogPath

Thanks for your report. I'll look into it.

With WinSCP.exe 6.5.6, when creating a new Session object in C# using object initialisation syntax:

• it's possible to assign null to DebugLogPath
  
• it's possible to assign null to XmlLogPath
  
• attempting to assign null to SessionLogPath throws System.NullReferenceException ('Object reference not set to an instance of an object.')
  

The workaround is to add a null-check prior to assignment.

For consistency, can the code be updated so all LogPath parameters accept an assignment of null?

Thanks.