navigation and display different page in single frame problem???


My name is Siol Singhai. I m a BE final year student and my
final project is based on WPF and C#. i have some problem in my UI . i
take navigation pane in left site on my UI and in middle right side i
take a frame where i want to display different page in single
frame.... so what code i write when i click on navigationpaneitem
button those display different pages in single frame????????