I don't have a problem with ReSharper but some where in my study I read that using "_" is not recomended.
ReSharper is trying to rename From
private System.Windows.Forms.Button button1;
To
private System.Windows.Forms.Button _button1;
EDIT: Note that I don't want to change it, I am asking if the _xxx is the standard. Why is visual studio not putting it?