HttpListenerResponse.Close Method (Byte[], Boolean)

Note: This method is new in the .NET Framework version 2.0.

Returns the specified byte array to the client and releases the resources held by this HttpListenerResponse instance.

Namespace: System.Net
Assembly: System (in system.dll)

public void Close (
	byte[] responseEntity,
	bool willBlock
public void Close (
	byte[] responseEntity, 
	boolean willBlock
public function Close (
	responseEntity : byte[], 
	willBlock : boolean



A Byte array that contains the response to send to the client.


true to block execution while flushing the stream to the client; otherwise, false.

Exception typeCondition


responseEntity is a null reference (Nothing in Visual Basic).


This object is closed.

If you are sending body data with the response, you can use this method to send it as a Byte array instead of writing the body data to the OutputStream property and calling the Close method.

This method closes the response stream and the HttpListenerRequest associated with the response.

The following code example demonstrates calling this method.

// This example requires the System and System.Net namespaces.
public static void SimpleListenerExample2(string[] prefixes)
    // URI prefixes are required,
    // for example "".
    if (prefixes == null || prefixes.Length == 0)
      throw new ArgumentException("prefixes");
    // Create a listener.
    HttpListener listener = new HttpListener();
    // Add the prefixes.
    foreach (string s in prefixes)
    // Note: The GetContext method blocks while waiting for a request. 
    HttpListenerContext context = listener.GetContext();
    HttpListenerRequest request = context.Request;
    // Obtain a response object.
    HttpListenerResponse response = context.Response;
    // Construct a response.
    string responseString = "<HTML><BODY> Hello world!</BODY></HTML>";
    byte[] buffer = System.Text.Encoding.UTF8.GetBytes(responseString);
    // Get a response stream and write the response to it.
    response.ContentLength64 = buffer.Length;
    // Demonstrate using the close overload that takes an 
    // entity body.
    // Specify true to block while data is transmitted.
    response.Close(buffer, true);

Windows 98, Windows Server 2003, Windows XP Media Center Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0