SkipObject.cs

public void SkipObject(Stream stream)
{
    var reader = new BinaryReader(stream);
            
    stream.Position += reader.ReadInt32();
}

SkipObjectExplained.cs

public void SkipObject(Stream stream)
{
    var reader = new BinaryReader(stream);
            
    // The problem here is that we first get the current position 
    // from the stream, then we read our int (moving the stream
    // forward 4 bytes), then sum the position and the int, but the
    // position value we read initially is now out of date so we wind 
    // up being 4 bytes away from where we expected.
    stream.Position = stream.Position + reader.ReadInt32();
}

SkipObjectFixed.cs

public void SkipObject(Stream stream)
{
    var reader = new BinaryReader(stream);
    var objectSize = reader.ReadInt32();

    stream.Position += objectSize;
}