public void GetDiagonal()
 {
   ComplexFloatMatrix a = new ComplexFloatMatrix(2,2);
   a[0,0] = new ComplexFloat(1);
   a[0,1] = new ComplexFloat(2);
   a[1,0] = new ComplexFloat(3);
   a[1,1] = new ComplexFloat(4);
   ComplexFloatVector b = a.GetDiagonal();
   Assert.AreEqual(b[0], a[0,0]);
   Assert.AreEqual(b[1], a[1,1]);
 }