Strange issue with System.Speech speech synthesizer

Question

I am working on a program that includes speech synthesis. A few weeks ago I wrote an introductory

    using (SpeechSynthesizer s = new SpeechSynthesizer())
    {
        s.SetOutputToWaveFile("file.wav");
        s.Speak(textBox1.Text);
    }

program. Everything went perfectly. I crossed out the “synthesis of synthetic speech” from my task list and moved on to other parts of the project.

Now I am writing a real program and trying to use the same basic block of code. However, now it does not work on a call s.SetOutputToWaveFile. It throws a PlatformNotSupportedException with the following message: "The system does not have a voice installed on the system or not in the current security setting."

I'm on 32-bit Vista. As far as I can tell, both programs have the same compiler settings. Please note that this is a Winforms application, not ASP.Net or something partially trusted. I stopped the source program in another instance of Visual Studio and it still works fine.

Any ideas?

Edit, 11/9/09:

I added generosity, and now even this program:

static void Main(string[] args)
{
    using (SpeechSynthesizer ss = new SpeechSynthesizer())
    {
        ss.Speak("Hello There");
    }
}

fails. I suppose there is some permission or something that I need to install, but I can not find it. My other program, the initial, basic program that does the same thing as this new one, still works.

Answer 1

WinDiff .csproj , ?

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