Windows Forms: Task Manager in C#

Step 1: Click New Project, then select Visual C# on the left, then Windows and then select Windows Forms Application. Name your project "TaskManager" and then click OK

Step 2: Design your form as below

Your main form name: Form1

Your run new task name: frmRunTask

Step 3: Add code to handle your form as below

Form1

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace TaskManager
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        Process[] proc;

        //Get all process running
        void GetAllProcess()
        {
            proc = Process.GetProcesses();
            listBox.Items.Clear();
            foreach (Process p in proc)
                listBox.Items.Add(p.ProcessName);
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            GetAllProcess();
        }

        private void btnEndTask_Click(object sender, EventArgs e)
        {
            try
            {
                //Kill process
                proc[listBox.SelectedIndex].Kill();
                GetAllProcess();
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message, "Message", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void runNewTaskToolStripMenuItem_Click(object sender, EventArgs e)
        {
            using(frmRunTask frm=new frmRunTask())
            {
                if (frm.ShowDialog() == DialogResult.OK)
                    GetAllProcess();
            }
        }
    }
}

frmRunTask

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace TaskManager
{
    public partial class frmRunTask : Form
    {
        public frmRunTask()
        {
            InitializeComponent();
        }

        private void btnRun_Click(object sender, EventArgs e)
        {
            if (!string.IsNullOrEmpty(txtOpen.Text))
            {
                try
                {
                    //Start new process
                    Process proc = new Process();
                    proc.StartInfo.FileName = txtOpen.Text;
                    proc.Start();
                }
                catch(Exception ex)
                {
                    MessageBox.Show(ex.Message, "Message", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }
    }
}

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