Update README.md

Author: daniele77

README.md

@@ -144,9 +144,7 @@ E.g., from a visual studio console, use one of the following commands:
 
 ### Visual Studio solution
 
-Currently, the VS solution compiles the examples only with the BOOST dependency.
-
-Set the environment variable BOOST. Then, open the file
+Set the environment variables BOOST and/or ASIO. Then, open the file
 `cli/examples/examples.sln`
 
 ## Compilation of the Doxygen documentation