FileStream question

Does anyone know if I can read a text file from a web server with the FileStream class ?  For example, if my .net application was launched from www.ws.com\myapp.exe, could I read a file from www.ws.com by the name of mytextfile with the following code ?

string Dir = AppDomain.CurrentDomain.BaseDirectory;

file = new FileStream(Dir+"mytextfile",               FileMode.Open,FileAccess.Read,FileShare.ReadWrite);

reader = new BinaryReader(file, Encoding.Unicode);

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