public void TestAverageArray()
 {
     CollectionAssert.AreEqual(new double[] { 2, 4, 8, 5.67, 7 }, MultiDimensionArray.AverageArray(new int[, ] {
         { 1, 2, 3 },
         { 3, 4, 5 },
         { 7, 8, 9 },
         { 8, 7, 2 },
         { 7, 7, 7 }
     }), new Comparer(0.01));
 }