Specifies the index number for the If-Modified-Since HTTP header.
Value: 30
Syntax
public const int HeaderIfModifiedSince
Remarks
The .NET Framework assigns an index number to each standard HTTP header type, for use in the HttpWorkerRequest.GetKnownRequestHeader(int) and HttpWorkerRequest.SendKnownResponseHeader(int, string) methods.
Requirements
Namespace: System.Web
Assembly: System.Web (in System.Web.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0
Assembly: System.Web (in System.Web.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0