Csharp/CSharp Tutorial/Thread/Background Thread
Move thread to background
<source lang="csharp">using System; using System.Threading; class MainClass {
public static void DoCount()
{
for ( int i = 0; true; i++ )
{
System.Console.WriteLine( "{0} reached {1}", Thread.CurrentThread.Name, i );
}
}
static void Main(string[] args)
{
Thread[] t = new Thread[ 10 ];
for( int k = 0; k < t.Length; k++ )
{
t[ k ] = new Thread( new ThreadStart( DoCount ) );
t[ k ].Name = "Thread " + k;
t[ k ].IsBackground = true;
t[ k ].Start();
}
Thread.Sleep( 1000 );
System.Console.WriteLine( "Exiting main thread" );
}
}</source>
Thread 0 reached 0 Thread 0 reached 1 Thread 0 reached 2 Thread 0 reached 3 Thread 0 reached 4 Thread 0 reached 5 Thread 0 reached 6 Thread 0 reached 7 Thread 0 reached 8 Thread 0 reached 9 Thread 0 reached 10 Thread 0 reached 11 Thread 0 reached 12 Thread 0 reached 13 Thread 0 reached 14 Thread 0 reached 15 Thread 0 reached 16 Thread 0 reached 17 Thread 0 reached 18 Thread 0 reached 19 Thread 0 reached 20 Thread 0 reached 21 Thread 0 reached 22 Thread 0 reached 23 Thread 0 reached 24 Thread 0 reached 25 Thread 0 reached 26 Thread 0 reached 27 Thread 0 reached 28 Thread 0 reached 29 Thread 0 reached 30 Thread 1 reached 0 Thread 1 reached 1 Thread 1 reached 2 Thread 1 reached 3 Thread 1 reached 4 Thread 1 reached 5 Thread 1 reached 6 Thread 1 reached 7 Thread 1 reached 8 Thread 1 reached 9 Thread 1 reached 10 Thread 1 reached 11 Thread 1 reached 12 Thread 1 reached 13 Thread 1 reached 14 Thread 1 reached 15 Thread 1 reached 16 Thread 1 reached 17 Thread 1 reached 18 Thread 1 reached 19 Thread 1 reached 20 Thread 1 reached 21 Thread 1 reached 22 Thread 1 reached 23 Thread 1 reached 24 Thread 1 reached 25 Thread 1 reached 26 Thread 1 reached 27 Thread 1 reached 28 Thread 1 reached 29 Thread 1 reached 30 Thread 1 reached 31 Thread 1 reached 32 Thread 1 reached 33 Thread 1 reached 34 Thread 1 reached 35 Thread 1 reached 36 Thread 1 reached 37 Thread 1 reached 38 Thread 1 reached 39 Thread 1 reached 40 Thread 1 reached 41 Thread 1 reached 42 Thread 1 reached 43 Thread 1 reached 44 Thread 1 reached 45 Thread 1 reached 46 Thread 1 reached 47 Thread 1 reached 48 Thread 1 reached 49 Thread 1 reached 50 Thread 1 reached 51 Thread 1 reached 52 Thread 1 reached 53 Thread 1 reached 54 Thread 1 reached 55 Thread 1 reached 56 Thread 1 reached 57 Thread 1 reached 58 Thread 1 reached 59 Thread 1 reached 60 Thread 1 reached 61 Thread 1 reached 62 Thread 1 reached 63 Thread 1 reached 64 Thread 1 reached 65 Thread 1 reached 66 Thread 1 reached 67 Thread 1 reached 68 Thread 1 reached 69 Thread 1 reached 70 Thread 1 reached 71 Thread 1 reached 72 Thread 1 reached 73 Thread 1 reached 74 Thread 1 reached 75 Thread 1 reached 76 Thread 1 reached 77 Thread 1 reached 78 Thread 1 reached 79 Thread 1 reached 80 Thread 1 reached 81 Thread 1 reached 82 Thread 1 reached 83 Thread 1 reached 84 Thread 1 reached 85 Thread 1 reached 86 Thread 1 reached 87 Thread 1 reached 88 Thread 1 reached 89 Thread 1 reached 90 Thread 1 reached 91 Thread 1 reached 92 Thread 1 reached 93 Thread 1 reached 94 Thread 1 reached 95 Thread 1 reached 96 Thread 1 reached 97 Thread 1 reached 98 Thread 1 reached 99 Thread 1 reached 100 Thread 1 reached 101 Thread 1 reached 102 Thread 1 reached 103 Thread 1 reached 104 Thread 1 reached 105 Thread 1 reached 106 Thread 1 reached 107 Thread 1 reached 108 Thread 1 reached 109 Thread 1 reached 110 Thread 1 reached 111 Thread 1 reached 112 Thread 1 reached 113 Thread 1 reached 114 Thread 1 reached 115 Thread 1 reached 116 Thread 1 reached 117 Thread 1 reached 118 Thread 1 reached 119 Thread 1 reached 120 Thread 1 reached 121 Thread 1 reached 122 Thread 1 reached 123 Thread 1 reached 124 Thread 1 reached 125 Thread 1 reached 126 Thread 1 reached 127 Thread 1 reached 128 Thread 1 reached 129 Thread 1 reached 130 Thread 1 reached 131 Thread 1 reached 132 Thread 1 reached 133 Thread 1 reached 134 Thread 1 reached 135 Thread 1 reached 136 Thread 1 reached 137 Thread 1 reached 138 Thread 1 reached 139 Thread 1 reached 140 Thread 1 reached 141 Thread 1 reached 142 Thread 1 reached 143 Thread 1 reached 144 Thread 1 reached 145 Thread 1 reached 146 Thread 1 reached 147 Thread 1 reached 148 Thread 1 reached 149 Thread 1 reached 150 Thread 1 reached 151 Thread 1 reached 152 Thread 1 reached 153 Thread 1 reached 154 Thread 1 reached 155 Thread 1 reached 156 Thread 1 reached 157 Thread 1 reached 158 Thread 1 reached 159 Thread 1 reached 160 Thread 1 reached 161 Thread 1 reached 162 Thread 1 reached 163 Thread 1 reached 164 Thread 1 reached 165 Thread 1 reached 166 Thread 1 reached 167 Thread 1 reached 168 Thread 1 reached 169 Thread 1 reached 170 Thread 1 reached 171 Thread 1 reached 172 Thread 1 reached 173 Thread 1 reached 174 Thread 1 reached 175 Thread 1 reached 176 Thread 1 reached 177 Thread 1 reached 178 Thread 1 reached 179 Thread 1 reached 180 Thread 1 reached 181 Thread 1 reached 182 Thread 1 reached 183 Thread 1 reached 184 Thread 1 reached 185 Thread 1 reached 186 Thread 1 reached 187 Thread 1 reached 188 Thread 1 reached 189 Thread 1 reached 190 Thread 1 reached 191 Thread 1 reached 192 Thread 1 reached 193 Thread 1 reached 194 Thread 1 reached 195 Thread 1 reached 196 Thread 1 reached 197 Thread 1 reached 198 Thread 1 reached 199 Thread 1 reached 200 Thread 1 reached 201 Thread 1 reached 202 Thread 1 reached 203 Thread 0 reached 31 Thread 2 reached 0 Thread 2 reached 1 Thread 2 reached 2 Thread 2 reached 3 Thread 2 reached 4 Thread 2 reached 5 Thread 2 reached 6 Thread 2 reached 7 Thread 2 reached 8 Thread 2 reached 9 Thread 2 reached 10 Thread 2 reached 11 Thread 2 reached 12 Thread 2 reached 13 Thread 2 reached 14 Thread 2 reached 15 Thread 2 reached 16 Thread 3 reached 0 Thread 3 reached 1 Thread 3 reached 2 Thread 3 reached 3 Thread 3 reached 4 Thread 3 reached 5 Thread 3 reached 6 Thread 3 reached 7 Thread 3 reached 8 Thread 3 reached 9 Thread 3 reached 10 Thread 3 reached 11 Thread 3 reached 12 Thread 3 reached 13 Thread 3 reached 14 Thread 3 reached 15 Thread 3 reached 16 Thread 4 reached 0 Thread 4 reached 1 Thread 4 reached 2 Thread 4 reached 3 Thread 4 reached 4 Thread 4 reached 5 Thread 4 reached 6 Thread 4 reached 7 Thread 4 reached 8 Thread 4 reached 9 Thread 4 reached 10 Thread 4 reached 11 Thread 4 reached 12 Thread 4 reached 13 Thread 4 reached 14 Thread 4 reached 15 Thread 4 reached 16 Thread 4 reached 17 Thread 4 reached 18 Thread 4 reached 19 Thread 4 reached 20 Thread 4 reached 21 Thread 4 reached 22 Thread 4 reached 23 Thread 4 reached 24 Thread 4 reached 25 Thread 4 reached 26 Thread 4 reached 27 Thread 4 reached 28 Thread 4 reached 29 Thread 4 reached 30 Thread 4 reached 31 Thread 4 reached 32 Thread 4 reached 33 Thread 4 reached 34 Thread 5 reached 0 Thread 5 reached 1 Thread 5 reached 2 Thread 5 reached 3 Thread 5 reached 4 Thread 5 reached 5 Thread 5 reached 6 Thread 5 reached 7 Thread 5 reached 8 Thread 5 reached 9 Thread 5 reached 10 Thread 5 reached 11 Thread 5 reached 12 Thread 5 reached 13 Thread 5 reached 14 Thread 5 reached 15 Thread 5 reached 16 Thread 5 reached 17 Thread 5 reached 18 Thread 5 reached 19 Thread 5 reached 20 Thread 5 reached 21 Thread 5 reached 22 Thread 5 reached 23 Thread 5 reached 24 Thread 5 reached 25 Thread 5 reached 26 Thread 5 reached 27 Thread 5 reached 28 Thread 5 reached 29 Thread 5 reached 30 Thread 5 reached 31 Thread 6 reached 0 Thread 6 reached 1 Thread 6 reached 2 Thread 6 reached 3 Thread 6 reached 4 Thread 6 reached 5 Thread 6 reached 6 Thread 6 reached 7 Thread 6 reached 8 Thread 6 reached 9 Thread 6 reached 10 Thread 6 reached 11 Thread 6 reached 12 Thread 6 reached 13 Thread 6 reached 14 Thread 6 reached 15 Thread 6 reached 16 Thread 7 reached 0 Thread 7 reached 1 Thread 7 reached 2 Thread 7 reached 3 Thread 7 reached 4 Thread 7 reached 5 Thread 7 reached 6 Thread 7 reached 7 Thread 7 reached 8 Thread 7 reached 9 Thread 7 reached 10 Thread 7 reached 11 Thread 7 reached 12 Thread 7 reached 13 Thread 7 reached 14 Thread 7 reached 15 Thread 7 reached 16 Thread 7 reached 17 Thread 7 reached 18 Thread 7 reached 19 Thread 7 reached 20 Thread 7 reached 21 Thread 7 reached 22 Thread 7 reached 23 Thread 7 reached 24 Thread 7 reached 25 Thread 7 reached 26 Thread 7 reached 27 Thread 7 reached 28 Thread 7 reached 29 Thread 7 reached 30 Thread 7 reached 31 Thread 7 reached 32 Thread 7 reached 33 Thread 7 reached 34 Thread 8 reached 0 Thread 8 reached 1 Thread 8 reached 2 Thread 8 reached 3 Thread 8 reached 4 Thread 8 reached 5 Thread 8 reached 6 Thread 8 reached 7 Thread 8 reached 8 Thread 8 reached 9 Thread 8 reached 10 Thread 8 reached 11 Thread 8 reached 12 Thread 8 reached 13 Thread 8 reached 14 Thread 8 reached 15 Thread 8 reached 16 Thread 9 reached 0 Thread 9 reached 1 Thread 9 reached 2 Thread 9 reached 3 Thread 9 reached 4 Thread 9 reached 5 Thread 9 reached 6 Thread 9 reached 7 Thread 9 reached 8 Thread 9 reached 9 Thread 9 reached 10 Thread 9 reached 11 Thread 9 reached 12 Thread 9 reached 13 Thread 9 reached 14 Thread 9 reached 15 Thread 9 reached 16 Thread 9 reached 17 Thread 9 reached 18 Thread 9 reached 19 Thread 9 reached 20 Thread 9 reached 21 Thread 9 reached 22 Thread 9 reached 23 Thread 9 reached 24 Thread 9 reached 25 Thread 9 reached 26 Thread 9 reached 27 Thread 9 reached 28 Thread 9 reached 29 Thread 9 reached 30 Thread 9 reached 31 Thread 9 reached 32 Thread 9 reached 33 Thread 9 reached 34 Thread 9 reached 35 Thread 9 reached 36 Thread 9 reached 37 Thread 9 reached 38 Thread 9 reached 39 Thread 9 reached 40 Thread 9 reached 41 Thread 9 reached 42 Thread 9 reached 43 Thread 9 reached 44 Thread 9 reached 45 Thread 9 reached 46 Thread 9 reached 47 Thread 9 reached 48 Thread 9 reached 49 Thread 9 reached 50 Thread 9 reached 51 Thread 9 reached 52 Thread 0 reached 32 Thread 0 reached 33 Thread 0 reached 34 Thread 0 reached 35 Thread 0 reached 36 Thread 0 reached 37 Thread 0 reached 38 Thread 0 reached 39 Thread 0 reached 40 Thread 0 reached 41 Thread 0 reached 42 Thread 0 reached 43 Thread 0 reached 44 Thread 0 reached 45 Thread 0 reached 46 Thread 0 reached 47 Thread 0 reached 48 Thread 1 reached 204 Thread 1 reached 205 Thread 1 reached 206 Thread 1 reached 207 Thread 1 reached 208 Thread 1 reached 209 Thread 1 reached 210 Thread 1 reached 211 Thread 1 reached 212 Thread 1 reached 213 Thread 1 reached 214 Thread 1 reached 215 Thread 1 reached 216 Thread 1 reached 217 Thread 1 reached 218 Thread 1 reached 219 Thread 1 reached 220 Thread 1 reached 221 Thread 1 reached 222 Thread 1 reached 223 Thread 1 reached 224 Thread 1 reached 225 Thread 1 reached 226 Thread 1 reached 227 Thread 1 reached 228 Thread 1 reached 229 Thread 1 reached 230 Thread 1 reached 231 Thread 1 reached 232 Thread 1 reached 233 Thread 1 reached 234 Thread 1 reached 235 Thread 1 reached 236 Thread 1 reached 237 Thread 1 reached 238 Thread 2 reached 17 Thread 2 reached 18 Thread 2 reached 19 Thread 2 reached 20 Thread 2 reached 21 Thread 2 reached 22 Thread 2 reached 23 Thread 2 reached 24 Thread 2 reached 25 Thread 2 reached 26 Thread 2 reached 27 Thread 2 reached 28 Thread 2 reached 29 Thread 2 reached 30 Thread 2 reached 31 Thread 2 reached 32 Thread 2 reached 33 Thread 2 reached 34 Thread 2 reached 35 Thread 2 reached 36 Thread 2 reached 37 Thread 2 reached 38 Thread 2 reached 39 Thread 2 reached 40 Thread 2 reached 41 Thread 2 reached 42 Thread 2 reached 43 Thread 2 reached 44 Thread 2 reached 45 Thread 2 reached 46 Thread 2 reached 47 Thread 2 reached 48 Thread 2 reached 49 Thread 2 reached 50 Thread 2 reached 51 Thread 3 reached 17 Thread 3 reached 18 Thread 3 reached 19 Thread 3 reached 20 Thread 3 reached 21 Thread 3 reached 22 Thread 3 reached 23 Thread 3 reached 24 Thread 3 reached 25 Thread 3 reached 26 Thread 3 reached 27 Thread 3 reached 28 Thread 3 reached 29 Thread 3 reached 30 Thread 3 reached 31 Thread 3 reached 32 Thread 3 reached 33 Thread 4 reached 35 Thread 4 reached 36 Thread 4 reached 37 Thread 4 reached 38 Thread 4 reached 39 Thread 4 reached 40 Thread 4 reached 41 Thread 4 reached 42 Thread 4 reached 43 Thread 4 reached 44 Thread 4 reached 45 Thread 4 reached 46 Thread 4 reached 47 Thread 4 reached 48 Thread 4 reached 49 Thread 4 reached 50 Thread 4 reached 51 Thread 4 reached 52 Thread 4 reached 53 Thread 4 reached 54 Thread 4 reached 55 Thread 4 reached 56 Thread 4 reached 57 Thread 4 reached 58 Thread 4 reached 59 Thread 4 reached 60 Thread 4 reached 61 Thread 4 reached 62 Thread 4 reached 63 Thread 4 reached 64 Thread 4 reached 65 Thread 4 reached 66 Thread 4 reached 67 Thread 5 reached 32 Thread 5 reached 33 Thread 5 reached 34 Thread 5 reached 35 Thread 5 reached 36 Thread 5 reached 37 Thread 5 reached 38 Thread 5 reached 39 Thread 5 reached 40 Thread 5 reached 41 Thread 5 reached 42 Thread 5 reached 43 Thread 5 reached 44 Thread 5 reached 45 Thread 5 reached 46 Thread 5 reached 47 Thread 5 reached 48 Thread 5 reached 49 Thread 5 reached 50 Thread 5 reached 51 Thread 5 reached 52 Thread 5 reached 53 Thread 5 reached 54 Thread 5 reached 55 Thread 5 reached 56 Thread 5 reached 57 Thread 5 reached 58 Thread 5 reached 59 Thread 5 reached 60 Thread 5 reached 61 Thread 5 reached 62 Thread 5 reached 63 Thread 5 reached 64 Thread 5 reached 65 Thread 5 reached 66 Thread 6 reached 17 Thread 6 reached 18 Thread 6 reached 19 Thread 6 reached 20 Thread 6 reached 21 Thread 6 reached 22 Thread 6 reached 23 Thread 6 reached 24 Thread 6 reached 25 Thread 6 reached 26 Thread 6 reached 27 Thread 6 reached 28 Thread 6 reached 29 Thread 6 reached 30 Thread 6 reached 31 Thread 6 reached 32 Thread 6 reached 33 Thread 6 reached 34 Thread 6 reached 35 Thread 6 reached 36 Thread 6 reached 37 Thread 6 reached 38 Thread 6 reached 39 Thread 6 reached 40 Thread 6 reached 41 Thread 6 reached 42 Thread 6 reached 43 Thread 6 reached 44 Thread 6 reached 45 Thread 6 reached 46 Thread 6 reached 47 Thread 6 reached 48 Thread 6 reached 49 Thread 6 reached 50 Thread 6 reached 51 Exiting main thread
Set IsBackground to true
<source lang="csharp">using System; using System.Collections.Generic; using System.Text; using System.Threading; public class Printer {
public void PrintNumbers() {
Console.WriteLine("-> {0} is executing PrintNumbers()", Thread.CurrentThread.Name);
Console.Write("Your numbers: ");
for (int i = 0; i < 10; i++) {
Console.Write(i + ", ");
Thread.Sleep(2000);
}
Console.WriteLine();
}
} class Program {
static void Main(string[] args) {
Printer p = new Printer();
Thread bgroundThread = new Thread(new ThreadStart(p.PrintNumbers));
bgroundThread.IsBackground = true;
bgroundThread.Start();
}
}</source>
Test foreground / worker behaviors
<source lang="csharp">using System; using System.Threading; class MainClass {
static void MyThreadProc()
{
Thread.CurrentThread.Name = "TheSecondaryThread";
Thread secondaryThread = Thread.CurrentThread;
Console.WriteLine("Name? {0}", secondaryThread.Name);
Console.WriteLine("Alive? {0}", secondaryThread.IsAlive);
Console.WriteLine("Priority? {0}", secondaryThread.Priority);
Console.WriteLine("State? {0}", secondaryThread.ThreadState);
Console.WriteLine();
for(int i = 0; i < 1000; i ++)
{
Console.WriteLine("Value of i is: {0}", i);
Thread.Sleep(5);
}
}
[MTAThread]
static void Main(string[] args)
{
Thread secondaryThread = new Thread(new ThreadStart(MyThreadProc));
secondaryThread.Priority = ThreadPriority.Highest;
secondaryThread.IsBackground = true;
secondaryThread.Start();
}
}</source>
Name? TheSecondaryThread Alive? True Priority? Highest State? Background Value of i is: 0
