Binaryreader returning wrong position

Question

Hello.

 

I am reading in a file as a stream through a binaryreader. I read in a number of bytes but when checking the basestream position its a lot further a long than it should be.

 

Code example: 

public void MainLoader()
{
    FileStream input = System.IO.File.Open(path, System.IO.FileMode.Open);
    BinaryReader binaryReader = new BinaryReader(input, Encoding.GetEncoding(1252));
    byte[] bytes = binaryReader.ReadBytes(256); // 256 bytes
    binaryReader.ReadInt32(); //4 bytes
    binaryReader.ReadInt32(); //4 bytes
    binaryReader.ReadInt16(); //2 bytes
    binaryReader.ReadInt32(); //4 bytes
    binaryReader.ReadInt16(); //2 bytes
    binaryReader.ReadByte(); // 1 byte
    binaryReader.ReadBoolean(); // 1 byte
    binaryReader.ReadByte(); // 1 byte
    binaryReader.ReadByte(); // 1 byte
    binaryReader.ReadInt16(); //2 bytes
    binaryReader.ReadByte(); // 1 byte
    binaryReader.ReadBoolean(); // 1 byte
    binaryReader.ReadByte(); // 1 byte
    binaryReader.ReadByte(); // 1 byte
    binaryReader.ReadByte(); // 1 byte
    binaryReader.ReadInt16(); //2 bytes
    binaryReader.ReadInt16(); //2 bytes
    binaryReader.ReadByte(); // 1 byte
    //New for 2017
    binaryReader.ReadByte(); // 1 byte
    binaryReader.ReadByte(); // 1 byte
    binaryReader.ReadByte(); // 1 byte
    binaryReader.ReadByte(); // 1 byte
    // should return 292
    var position = binaryReader.BaseStream.Position
    binaryReader.Close();
}

 Adding up all the read in bytes should be 292, and this should be the stream position too ( I read from the start of the file)

 

The issue I have is that in fact it returns 4096. I do not understand this, what could be influences this.

 

I have thought maybe Culture settings, Encoding, or Endians, but I am no sure.

 

Any thoughts would be great.