wpf
1. updateSourceTrigger
http://www.codeproject.com/Articles/507883/UpdateSourceTrigger-Property-in-WPF-Binding
2. Mode
https://msdn.microsoft.com/en-us/library/system.windows.data.bindingmode(v=vs.110).aspx
3. RelativeSourceMode
http://www.c-sharpcorner.com/uploadfile/yougerthen/relativesources-in-wpf/