Update: this setting was changed in VS 2015 update 2. See this answer.
This post addresses your question. The gist of it is:
Text Editor > C# > Advanced > Generate XML documentation comments for ///
Update: this setting was changed in VS 2015 update 2. See this answer.
This post addresses your question. The gist of it is:
Text Editor > C# > Advanced > Generate XML documentation comments for ///