C#

using System;
using System.Linq;
using System.Collections.Generic;
using System.Windows.Forms;

namespace inventering
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [MTAThread]
        static void Main()
        {
            Form1 frm1 = new Form1();
            Application.Run(frm1);
        }
    }
}

using System;
using System.Linq;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Symbol.Barcode2;



namespace inventering
{
    public partial class Form1 : Form
    {
        Barcode2 MyBarcode;
        

        public Form1()
        {
            
            MyBarcode = new Barcode2();
            MyBarcode.Enable();
            MyBarcode.Scan();
            MyBarcode.OnScan += new Barcode2.OnScanHandler(myBarcode_OnScan);
            InitializeComponent();
        }

        private void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            if ((e.KeyCode == System.Windows.Forms.Keys.Up))
            {
                // Up
            }
            if ((e.KeyCode == System.Windows.Forms.Keys.Down))
            {
                // Down
            }
            if ((e.KeyCode == System.Windows.Forms.Keys.Left))
            {
                // Left
            }
            if ((e.KeyCode == System.Windows.Forms.Keys.Right))
            {
                // Right
            }
            if ((e.KeyCode == System.Windows.Forms.Keys.Enter))
            {
                // Enter
            }

        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void label1_ParentChanged(object sender, EventArgs e)
        {

        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {

        }

        void myBarcode_OnScan(ScanDataCollection sd)
        {
            ScanData scanData = sd.GetFirst;

            if (scanData.Result == Results.SUCCESS)
            {
                

                // Write the scanned data and type (symbology) to the list box
                textBox1.Text += (scanData.Text + ";" + scanData.Type.ToString());
            }
            
            //MyBarcode.Scan();
        }

        private void label2_ParentChanged(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {

            MyBarcode.Dispose();
            this.Close();
        
        }


    
    }
}

public form1(){
Task.factory.startnew(()=>processData(1));
Task.factory.startnew(()=>processData(2));
Task.factory.startnew(()=>processData(3));
Task.factory.startnew(()=>processData(4));
Task.factory.startnew(()=>processData(5));
Task.factory.startnew(()=>processData(6));
Task.factory.startnew(()=>processData(7));
Task.factory.startnew(()=>processData(8));
}

//recieve data high frequently 
void OndataReceive( string data){
if( ..){
queue1.Enqueue(data);
}
else if(...)
{
queue2.Enqueue(data);
}
....


retutn;
}

void processData(int queueID){
while(true){
ConcurrentQueue queue = getqueue(queueID)

for(int i =0; i < queue.Count; i++){
string s;
queue.TryDequeue(out s);
.....
}
Thread.Sleep(10);
}.
}