Adds a value to the collection.
Assembly: System.Web (in System.Web.dll)
Use the method to add an existing ParserError object to the collection. You cannot add the same ParserError object to the collection more than once. When you call the method using a ParserError object that is already in the collection, the addition fails and -1 is returned.
To add multiple objects to the collection, use the AddRange method.
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.