c# duplicate object instance

public static T DeepCopy<T>(T obj)
{
	if (!typeof(T).IsSerializable)
	{
		throw new Exception("The source object must be serializable");
	}

	if (Object.ReferenceEquals(obj, null))
	{
		throw new Exception("The source object must not be null");
	}

	T result = default(T);
	using (var memoryStream = new MemoryStream())
	{
		var formatter = new BinaryFormatter();
		formatter.Serialize(memoryStream, obj);

		memoryStream.Seek(0, SeekOrigin.Begin);

		result = (T)formatter.Deserialize(memoryStream);

		memoryStream.Close();
	}

	return result;
}