How to close a file in Autocad using C# keeping acad.exe running? -

i using visual studio 2010 , having .dwg file want open in autocad. till have used this.

process p = new process(); processstartinfo s = new processstartinfo("d:/test file/" + filename); p.startinfo = s; p.start(); 

but want close file inside autocad not autocad itself. (means atocad.exe should kept running).

till hve used closing acad.exe not file.

foreach (process proc in process.getprocesses()) {     if (proc.processname.equals("acad"))     {         proc.closemainwindow();         proc.kill();     } } 

take autocad .net libraries autodesk sites (http://usa.autodesk.com/adsk/servlet/index?id=773204&siteid=123112)

then able use application , document classes. give full control on opening , closing documents within application.

you can find many articles on that, , can ask further questions.