请参阅此线程从 JoelOnSoftware 描述这背后的原因。

See this thread from JoelOnSoftware describing the reasons behind this.

基本上接口是消费者与供应商之间的合同，以及一个静态方法属于类，而不是类作为这样的每个实例

Basically the interface is the contract between the consumer and the provider, and a static method belongs to the class, and not each instance of the class as such.

上也是如此处理完全一样的问题，前面一个问题：
的为什么不C＃允许静态方法来实现接口？

An earlier question on SO also deal with the exact same question: Why Doesn't C# Allow Static Methods to Implement an Interface?