To asynchronously collect the redirected Process.StandardOutput or Process.StandardError stream output of a process, you must create a method that handles the redirected stream output events. The event-handler method is called when the process writes to the redirected stream. The event delegate calls your event handler with an instance of System.Diagnostics.DataReceivedEventArgs. The DataReceivedEventArgs.Data property contains the text line that the process wrote to the redirected stream.

Namespace: System.Diagnostics
Assembly: System (in System.dll)
Assembly Versions: 2.0.0.0, 4.0.0.0
Since: .NET 2.0