How to write a Calculater Program by using dependency in C#?

Question

Gajendra Jangid · Answer

Use this link https://codereview.stackexchange.com/questions/123599/tiny-calculator-using-dependency-injection-and-inversion-of-control

Sachin Singh · Answer

You can either create it as a class library and directly reference to your UI app (console/web) or you can create a class file and use dependency injection by resgistering it inside Main() in .NET 6 or in startup.cs in .NET 5 downwards. public interface ICalculator { double Calculate( double num1, double num2, string operator); } public class Calculator:ICalculator { public double Calculate( double num1, double num2, string operand) { double ansewer=0; switch (operand) { case "-" : answer = num1 - num2; break ; case "+" : answer = num1 + num2; break ; case "/" : answer = num1 / num2; break ; case "*" : answer = num1 * num2; break ; default : answer = 0; break ; } return answer; } } startp.cs public void ConfigureServices(IServiceCollection services) { // services.AddTransient (); } UI layer public class controller:BaseController { private ICalculator _cal; public controller(ICalculator cal) { _cal=cal; } public double MyCalc( int a, int b) { return _cal.Calculate(a,b, "+" ); } }

Rajeesh Menoth · Answer

Hi, Please go through the following reference : https://codereview.stackexchange.com/questions/123599/tiny-calculator-using-dependency-injection-and-inversion-of-control

sree sree · Answer

Thank you Sachin Singh ji for solving my Query