菜单功能：

1、高通滤波器（类SignalFilterPassHigh，实现了接口ISignalFilter的所有方法）和低通滤波器（类SignalFilterPassLow，实现了接口ISignalFilter的所有方法）都有滤波功能（接口ISignalFilter定义了滤波器的功能：输入一组整数，滤波后输入另一组整数）。

2、用户选择不同的滤波器，程序生成对应滤波器的接口实例，直接使用接口方法即可。

3、总结接口的作用：

(1)规范编程行为，如定义的滤波器的功能。

(2)方便建立工厂模式，如工厂根据不同需求，提供不同产品。

源码特点：

很多初学者对C#接口的作用不了解，于是我写了“基于接口实现的信号滤波器示例”源码，供大家参考理解

注意事项：

开发环境为Visual Studio 2010，使用.net 3.5开发-Menu function:

1, high pass filter (class SignalFilterPassHigh, the interface ISignalFilter of all the methods) and low pass filter (SignalFilterPassLow, the interface ISignalFilter of all the methods) have filtering function (interface ISignalFilter definition of the filter function: input a set of integers, filtering the input of another group of integers).

2, the user selects a different filter, the program generates a corresponding filter interface instance, directly using the interface method.

3, summary the role of the interface:

(1) specification programming behavior, such as the definition of the filter function.

(2) to facilitate the establishment of a factory model, such as the factory to provide different products according to different requirements.

Source features:

Many beginners do not understand the role of the C# interface, so I wrote　based on the interface to achieve the signal filter sample　source code, for your reference

Note:

Development environment for S