diff --git a/trunk/paradiseo-mo/src/neighborhood/moXBitFlippingNeighbor.h b/trunk/paradiseo-mo/src/neighborhood/moXBitFlippingNeighbor.h
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+/*
+ <moXBitFlippingNeighbor.h>
+ Copyright (C) DOLPHIN Project-Team, INRIA Lille - Nord Europe, 2006-2010
+
+ Boufaras Karima, Thé Van Luong
+
+ This software is governed by the CeCILL license under French law and
+ abiding by the rules of distribution of free software.  You can  ue,
+ modify and/ or redistribute the software under the terms of the CeCILL
+ license as circulated by CEA, CNRS and INRIA at the following URL
+ "http://www.cecill.info".
+
+ In this respect, the user's attention is drawn to the risks associated
+ with loading,  using,  modifying and/or developing or reproducing the
+ software by the user in light of its specific status of free software,
+ that may mean  that it is complicated to manipulate,  and  that  also
+ therefore means  that it is reserved for developers  and  experienced
+ professionals having in-depth computer knowledge. Users are therefore
+ encouraged to load and test the software's suitability as regards their
+ requirements in conditions enabling the security of their systems and/or
+ data to be ensured and,  more generally, to use and operate it in the
+ same conditions as regards security.
+ The fact that you are presently reading this means that you have had
+ knowledge of the CeCILL license and that you accept its terms.
+
+ ParadisEO WebSite : http://paradiseo.gforge.inria.fr
+ Contact: paradiseo-help@lists.gforge.inria.fr
+ */
+
+#ifndef _moXBitFlippingNeighbor_h
+#define _moXBitFlippingNeighbor_h
+
+#include <neighborhood/moBackableNeighbor.h>
+#include <neighborhood/moXChangeNeighbor.h>
+
+/**
+ * X-BitFlipping Neighbor
+ * Neighbor represent different hamming distances,it's fixed by xFlip attribute
+ */
+
+template<class EOT, class Fitness = typename EOT::Fitness>
+class moXBitFlippingNeighbor:public moBackableNeighbor<EOT> ,
+		public moXChangeNeighbor<EOT> {
+public:
+
+	using moXChangeNeighbor<EOT>::indices;
+	using moXChangeNeighbor<EOT>::xChange;
+	using moXChangeNeighbor<EOT>::key;
+
+	/**
+	 *Default Constructor
+	 */
+
+	moXBitFlippingNeighbor() :
+		moXChangeNeighbor<EOT> () {
+	}
+
+	/**
+	 * Constructor
+	 * @param _xFlip the number of bit to flip
+	 */
+
+	moXBitFlippingNeighbor(unsigned int _xFlip) :
+		moXChangeNeighbor<EOT> (_xFlip) {
+	}
+
+	/**
+	 * Apply the K-Flip in solution
+	 * @param _solution the solution to move
+	 */
+
+	virtual void move(EOT& _solution) {
+			for (unsigned int i = 0; i < xChange; i++)
+				_solution[indices[i]] = !_solution[indices[i]];
+		_solution.invalidate();
+
+	}
+
+	/**
+	 * apply the K-Flip to restore the solution (use by moFullEvalByModif)
+	 * @param _solution the solution to move back
+	 */
+
+	virtual void moveBack(EOT& _solution) {
+		move(_solution);
+	}
+
+	/**
+	 * Return the class name.
+	 * @return the class name as a std::string
+	 */
+
+	virtual std::string className() const {
+		return "moXBitFlippingNeighbor";
+	}
+
+};
+
+#endif
+