Must Be Experienced with C# programming

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace ShapeApp { class Program { static void Main(string[] args) { Triangle triangle = new Triangle(); triangle.setPerimeter(); Console.WriteLine(triangle.getPerimeter()); Console.ReadLine(); } } class Triangle { private int perimeter; private int side1; private int side2; private int side3; public void setPerimeter() { Console.WriteLine("Calculate the perimeter of a triangle."); Console.Write("Enter the length of side 1: "); side1 = Convert.ToInt32(Console.ReadLine()); Console.Write("Enter the length of side 2: "); side2 = Convert.ToInt32(Console.ReadLine()); Console.Write("Enter the length fo side 3: "); side3 = Convert.ToInt32(Console.ReadLine()); perimeter = side1 + side2 + side3; } public int getPerimeter() { Console.Write("The perimeter of a triangle with sides {0}, {1}, and {2} is: ", side1, side2, side3); return perimeter; } } class Square { } class Rectangle { } }