The HelloWorld example based on C# only focuses on the Data Adapter side;
it inherits the client side from the base HelloWorld example.
The latter example shows you how you can create the
index.htm page;
it also points you to a complete version of the front-end at
http://www.lightstreamer.com/docs/articles/Hello%20World%20with%20Lightstreamer_file/LightstreamerHelloWorld.zip
It seems to me that the
index.htm file is always correctly spelled; is there any misunderstanding?