This documentation is archived and is not being maintained.

HttpWebRequest.UserAgent Property

Gets or sets the value of the User-agent HTTP header.

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

public string UserAgent { get; set; }

Property Value

Type: System.String
The value of the User-agent HTTP header. The default value is null.

The value for this property is stored in WebHeaderCollection. If WebHeaderCollection is set, the property value is lost.

The following code example sets the UserAgent property.

			// Create a new 'HttpWebRequest' object to the mentioned URL.
			HttpWebRequest myHttpWebRequest=(HttpWebRequest)WebRequest.Create("");
			myHttpWebRequest.UserAgent=".NET Framework Test Client";
			// Assign the response object of 'HttpWebRequest' to a 'HttpWebResponse' variable.
			HttpWebResponse myHttpWebResponse=(HttpWebResponse)myHttpWebRequest.GetResponse();
			// Display the contents of the page to the console.
			Stream streamResponse=myHttpWebResponse.GetResponseStream();
			StreamReader streamRead = new StreamReader( streamResponse );
			Char[] readBuff = new Char[256];
			int count = streamRead.Read( readBuff, 0, 256 );
			Console.WriteLine("\nThe contents of HTML Page are :\n");	
			while (count > 0) 
				String outputData = new String(readBuff, 0, count);
				count = streamRead.Read(readBuff, 0, 256);
			// Release the response object resources.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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