Adding reference of ClassLibrary to a project By:Tanuj Kumar

Adding reference of ClassLibrary to a project:

Problem 1:-->

Windowform1:

Step1:right click on add reference click browse goto classlibrary1>bin>debug> classlibrary1.dll

             

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using ClassLibrary1;

namespace WindowsFormsApplication1

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        Class1 obj = new Class1();

        private void button1_Click(object sender, EventArgs e)

        {

            double x;

            double y;

             x = double.Parse(textBox1.Text);

            y = double.Parse(textBox2.Text);

            label3.Text=(obj.add(x, y).ToString());

           

        }

        private void button2_Click(object sender, EventArgs e)

        {

            double x = double.Parse(textBox1.Text);

            double y = double.Parse(textBox2.Text);

            label3.Text=(obj.sub(x, y).ToString());

        }

        private void button3_Click(object sender, EventArgs e)

        {

            double x = double.Parse(textBox1.Text);

            double y = double.Parse(textBox2.Text);

           label3.Text=(obj.mul(x, y).ToString());

        }

        private void button4_Click(object sender, EventArgs e)

        {

            double x = double.Parse(textBox1.Text);

            double y = double.Parse(textBox2.Text);

            label3.Text=(obj.div(x, y).ToString());

        }

        private void label3_Click(object sender, EventArgs e)

        {

        }

        private void button5_Click(object sender, EventArgs e)

        {

            double x = double.Parse(textBox1.Text);

          //x = double.Parse(textBox2.Text);

            label3.Text = (obj.root(x).ToString());

        }

    }

}

Classlibrary1:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace ClassLibrary1

{

    public class Class1

    {

      

       public double add(double a, double b) {

            double c;

            c = a + b;

            return c;

        }

       public double sub(double a, double b)

        {

            double c;

            c = a-b;

            return c;

        }

      public  double mul(double a, double b)

        {

            double c;

            c = a* b;

            return c;

        }

       public double div(double a, double b)

        {

            double c;

            c = a / b;

            return c;

        }

       public double root(double a)

       {

           double c= Math.Sqrt(a);

           return c;

       }

    }

}

Build classlibrary “ctrl+shift+b”

Posted By:Tanuj Kumar 

On:Shareyourconscience