'Path' does not contain a definition for '...'

In file 

> VOXFileLoader/Scripts/VOXFileImport.cs

> 

I'll get an error.
Solved:
in line 551,557 and 615 change 
`Path.GetFileNameWithoutExtension(path)` 
to 
`System.IO.Path.GetFileNameWithoutExtension(path)`

Same in line 96 and 126 change
`Path.GetExtension(path)`
to
`System.IO.Path.GetExtension(path)`