gistfile1.cs

        public Dictionary<string, object[]> CompareObjects<T>(T obj1, T obj2)
        {
            var result = new Dictionary<string, object[]>();

            typeof(T)
                .GetProperties()
                .Select(p => new { p.Name, Val1 = p.GetValue(obj1, new object[] { }), Val2 = p.GetValue(obj2, new object[] { }) })
                .Where(i => i.Val1 != i.Val2)
                .ToList()
                .ForEach(p => result.Add(p.Name, new[] { p.Val1, p.Val2 }));

            return result;
        }