The Clear method does not clear header information.

The following example sets the ContentType property for the response to image/jpeg, calls the Clear method to remove other content that might be attached to the response, and then sets the BufferOutput property to true so that the complete page will be processed before any content is sent to the requesting client.

For a complete example, see the HttpResponse class.

' Set the page's content type to JPEG files
' and clears all content output from the buffer stream.
Response.ContentType = "image/jpeg"
Response.Clear()

' Buffer response so that page is sent
' after processing is complete.
Response.BufferOutput = True

// Set the page's content type to JPEG files
// and clears all content output from the buffer stream.
Response.ContentType = "image/jpeg";
Response.Clear();

// Buffer response so that page is sent
// after processing is complete.
Response.BufferOutput = true;

.NET Framework

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

Reference