msdn: “Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.” it contains only instance methods.
How should I use it in a way that all activity gets recorder by TextWriterTraceListener to a text file. Is one static member which all threads use (by calling) TraceEvent-method safe.
(I’ve kind of asked this question in how to instantiate C# TraceSources to log (multithreaded) ASP.NET 2.0 Web application (asmx ws)?, but I cannot just believe if somebody just says it’s OK despite the documentation).
The TraceSource class is thread safe. See http://msdn.microsoft.com/en-us/library/system.diagnostics.tracesource.aspx.
I believe that previously it wasn’t listed as thread safe but that was a documentation bug.