Creates a dynamic object from the differences of two strongly typed objects.

Diff.cs

public static class Diff
{
    public static dynamic GetDynamicDiff<T>(T left, T right)
    {
        return GetDynamicDiff(left, right, typeof(T));
    }

    private static dynamic GetDynamicDiff<T>(T left, T right, Type type)
    {
        dynamic expando = new System.Dynamic.ExpandoObject();
        var properties = type.GetProperties();

        foreach (var leftProperty in properties)
        {
            var rightProperty = type.GetProperty(leftProperty.Name);
            var leftValue = leftProperty.GetValue(left, null);
            var rightValue = rightProperty.GetValue(right, null);

            if (leftProperty.PropertyType.IsValueType && !object.Equals(leftValue, rightValue))
            {
                ((IDictionary<string, object>)expando).Add(leftProperty.Name, rightValue);
            }
            else if (!leftProperty.PropertyType.IsValueType && !(leftValue is string))
            {
                var diff = GetDynamicDiff(leftValue, rightValue, leftProperty.PropertyType);
                if (!((IDictionary<string, object>)diff).Any())
                    continue;

                ((IDictionary<string, object>)expando).Add(leftProperty.Name, ((IDictionary<string, object>)diff).Any() ? diff : null);
            }
            else if (!object.Equals(leftValue, rightValue))
            {
                ((IDictionary<string, object>)expando).Add(leftProperty.Name, rightValue);
            }
        }
        return expando;
    }
}