C# How to call method from another class

Question

I'm beginner with C# I need little help how to call method from one Class to another class. Since C# is strongly typed language I found it difficult to navigate through classes, methods etc. I want to take 'GetSalesRevenue() - Class Salesman' and use it at departments 'GetRevenue() - Class Departments '; This is my first attempt with C# OOP. Any help is appreciated!

using System;
using System.Collections.Generic;
using System.Text;


namespace EmployeeDepartment
{
    class Departments
    {
        public Departments(string[] developers, string[] salesman)
        {
            Developers = developers;
            Salesman = salesman;
        }

        public string[] Developers { get; set; }
        public string[] Salesman { get; set; }
        public void GetRevenue(Salesman value)
        {
            Console.WriteLine("Sum of revenus from All salesmen");
        }

        public void GetSkillset()
        {
            Console.WriteLine("Print all skills from the developers in the deparment");
        }
    }

}




using System;
using System.Collections.Generic;
using System.Text;

namespace EmployeeDepartment
{
    class Salesman : Employee
    {

        public Salesman(string name, string surname, int age, int salary, int salesrevenue, int salarysalesman) : base(name, surname, age, salary)
        {
            SalesRevenue = salesrevenue;
            SalarySalesman = salarysalesman;

        }
        private double SalesRevenue { get; set; }
        public double SalarySalesman { get; set; } = 400;

        // Salary is default 400 and Role is default Sales

        public double AddRevenue(double addRevenue)
        {
           return SalesRevenue += addRevenue;
        }
        public double GetSalesRevenue()
        {
            return SalesRevenue;
        }
        public double GetSalary(double plus)
        {
            return (SalesRevenue / 10) * 100;
        }
    }
    
}

Answer 1

I guess you're looking for something like this:

class Departments
{
    public Departments(string[] developers, string[] salesman)
    {
        Developers = developers;
        Salesman = salesman;
    }

    public string[] Developers { get; set; }
    public string[] Salesman { get; set; }
    
    public void GetRevenue(Salesman salesman)
    {
        double revenue = salesman.GetSalesRevenue();
        Console.WriteLine($"Sum of revenus from All salesmen: {revenue}" );
    }

    public void GetSkillset()
    {
        Console.WriteLine("Print all skills from the developers in the deparment");
    }
}