Q:

Combining multiple flags of an enum?

I've been trying to use multiple flags for the SpeechLibs Talk() function.
This is what I am trying to do:
V.Speak ("Text", SpeechVoiceSpeakFlags.SVSFlagsAsync + SpeechVoiceSpeakFlags.SVSFIsXML);

However, it gives me following error: 

Error 1   Operator '+' cannot be applied to operands of type 'SpeechLib.SpeechVoiceSpeakFlags' and 'SpeechLib.SpeechVoiceSpeakFlags'  c:\users\max\documents\visual studio 2013\projects\switch\switch\default_tts_screen.cs  62  51  Switch

The documentation though clearly states that this should be possible: 
Example
The following code snippet demonstrates the Speak method with several   commonly used flag settings.
[...]
V.Speak "text with XML", SVSFIsXML + SVSFlagsAsync
[...]

Please note that I am using C#, this however shouldn't change anything. Right?..
Please help me with this problem as it's already been smashing my head into my table since hours now.
I haven't found a solution to this online.

A:

You combine enum flags with a bitwise OR operator as follows:
V.Speak ("Text", SpeechVoiceSpeakFlags.SVSFlagsAsync | SpeechVoiceSpeakFlags.SVSFIsXML);

