Edit files with SharePoint Client Object model

I'm new to SharePoint and using SharePoint Foundation server 2010 to save files using client object model. The application will list the files in the server using MVC4 UI. To retreive the files and folders I use SharePoint 2010 client object model. I want to implement the Edit feature for the word and excel documents which is already available when we access SharePoint site directly through IE. Simply I just want to open the file and save changes to the server when we save it or close the program.How can I do it with client object model. Thanks in advanced.