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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.
NoteNote

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("http://www.contoso.com");
			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);
				Console.Write(outputData);
				count = streamRead.Read(readBuff, 0, 256);
			}
			// Release the response object resources.
			streamRead.Close();
			streamResponse.Close();
			myHttpWebResponse.Close();

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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