Class library reference demo in C#

Below is the class library project in which namespaces are nested. Here N2 namesapces is within N1 namespace. Both contains one class and method. we will first build the solution. After that, dll is created in bin folder in the same package of below program.

we will add the reference of this newly created dll file into another program so that it will use the N1 and N2 namespaces contents i.e. all classes and method implementations.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace N1
{
    public class A
    {
        public void ABC()
        {
            Console.WriteLine("ABC of A");
        }
    }

    namespace N2
    {
        public class B
        {
            public void XYZ()
            {
                Console.WriteLine("XYZ of B");
            }
        }
    }
}


After successful build of the previous program, right click on class file on the current program(below mentioned code) select add reference option. Now browse to the path where dll is created which is in bin folder of corresponding package where above file present. Now you will be able to access the methods ABC() and XYZ() of above mentioned program.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using N1;

namespace namespace_remaining
{
    class M
    {
        static void Main(string[] args)
        {
            A a1 = new A();
            a1.ABC();
            N1.N2.B b1 = new N1.N2.B();
            b1.XYZ();
            Console.ReadKey();
        }
    }
}