C# ban miért ezt írja ki?

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 System.IO;

using System.Windows.Forms;

namespace fogyasztasszamlalo

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void textBox2_TextChanged(object sender, EventArgs e)

{

}

private void button1_Click(object sender, EventArgs e)

{

string benzin = "", dizel = "";

char[] chrs = new char[3];

int counter = 0,counter2=0,km,vegeredmeny,szazon,ft;

string line,line2;

StreamReader sr= new StreamReader("C:\\benzin.txt");

while ((line = sr.ReadLine()) != null)

{

if (line.Contains("377"))

{

benzin=(counter.ToString() + ": "+ line);

}

counter++;

}

while ((line2 = sr.ReadLine()) != null)

{

if (line2.Contains("378"))

{

dizel = (counter2.ToString()+";"+line2);

}//

counter2++;

}

benzin.CopyTo(44, chrs, 0, 3);

textBox1.Text =Convert.ToString(chrs);

label1.Text = Convert.ToString(chrs);

sr.Close();

CopyTo metódus használata után kiíratom a stringemet és ezt írja ki: System.Char[] ez miért van???