执行方法Winforms后更新TextBox

I'm making a C# app to resotre many .bak Files stored in a directory. It works fine now, but I have one problem I can't seem to resolve and would like your help. The ExecuteNonQuery Takes a While to restore one .bak file and i want to update a textbox with a message everytime the ExecuteNonQuery completes. I'm making a C# app to resotre many .bak Files