Does anyone help me out, small white my urgent need!!! 1 c # console application, development, requirements definition an interface (using the interface keyword), the length and height of the encapsulated rectangle in the interface, and also contains a custom method, used to calculate the area of the rectangle, 2, and then define a class, in the class interface to realize the custom method, 3, and finally realizes the input from the keyboard in the main function after the length of the rectangle and input the width of the rectangle to get the area of the rectangle

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