Text To Speech

The text entered in the textbox should come as a voice.

In Design View

Put one textbox or button

Now go to Solution explorer

Right click on web Root

Select Add New Reference then select the COM tab on the top.
You'll find Microsoft Speech Object Library in the Component Name column.
Double click on Button that you add

Now Add

using SpeechLib;

protected void Button1_Click(object sender, EventArgs e)
{
           SpVoiceClass obj = new SpVoiceClass();           
           obj.Rate = 0;
           obj.Volume = 100;
           obj.Speak(TextBox1.Text, SpeechVoiceSpeakFlags.SVSFDefault);
}

Done.
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