public void TestLexiconNames2()
{
var request = new SynthesizeSpeechRequest()
{
LexiconNames = new List<string>() { "lex1", "lex2" }
};
var url = SynthesizeSpeechUtil.GeneratePresignedUrl(RegionEndpoint.USWest2, request);
Assert.IsTrue(url.Contains("LexiconNames=lex1&LexiconNames=lex2"));
}