Compile and Execute C# Sharp Online

using System;

namespace RectangleApplication {
   
   class Rectangle {
      // member variables
      double length;
      double width;
      
      public void Acceptdetails() {
         length = 56.2;    
         width = 23.6;
      }
      
      public double GetArea() {
         return length * width; 
      }
      
      public void Display() {
         Console.WriteLine("长度: "+ length);
         Console.WriteLine("宽度: "+ width);
         Console.WriteLine("面积: "+ GetArea());
      }
   }
   
   class ExecuteRectangle {
   
      static void Main(string[] args) {
         Rectangle r = new Rectangle();
         r.Acceptdetails();
         r.Display();
         Console.ReadLine(); 
      }
   }
}