System.Xml.XmlBufferReader.GetDouble C# (CSharp) Méthode

        unsafe public double GetDouble(int offset)
        {
            byte[] buffer = _buffer;
            double value;
            byte* pb = (byte*)&value;
            DiagnosticUtility.DebugAssert(sizeof(double) == 8, "");
            pb[0] = buffer[offset + 0];
            pb[1] = buffer[offset + 1];
            pb[2] = buffer[offset + 2];
            pb[3] = buffer[offset + 3];
            pb[4] = buffer[offset + 4];
            pb[5] = buffer[offset + 5];
            pb[6] = buffer[offset + 6];
            pb[7] = buffer[offset + 7];
            return value;
        }

 private double GetDouble()
 {
     DiagnosticUtility.DebugAssert(_type == ValueHandleType.Double, "");
     return(_bufferReader.GetDouble(_offset));
 }