Custom IO System doesnt work when Importing from stream about assimp-net HOT 2 OPEN

Indeed, I am seeing the error too. I'll look into a fix

FYI, the official AssimpNet repository that I maintain is over at BitBucket (https://bitbucket.org/Starnick/assimpnet/src/master/)

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I looked into this. Using the ImportFileFromStream doesn't use the IOSystem - this isn't an oversight, the native library is like that too. If additional model files need to be loaded (like the MTL file), it is recommended to attach an IOSystem and call ImportFromFile. In that scenario, the IOSystem you supply will open a stream to both the OBJ file and the MTL file.

I'm adding some documentation to the XML comments to reflect this.

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