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Singleton design pattern

Anti-pattern

According to single-responsibility principle this pattern can be considered as an anti-pattern because involves two responsibilities. Besides being a business entity itself it also implements a strategy of its instantiation. That has all disadvantages of being badly reusable.

It is better to use factories for instantion purposes. For example, IoC container and using Autofac (C#) it will look like:

var builder = new ContainerBuilder();
builder.RegisterType<BusinessObject>().SingleInstance();
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