asp.net - Does C# have a method for inserting a string before the extension part of a file name? -

i have bit of code like

 if (system.io.file.exists(newfilepath))  {                     string suffix = (datetime.now.ticks / timespan.tickspermillisecond).tostring();     newfilepath += suffix; 

but realized it's incorrect because meant put suffix before extension part of file name (if there 1 @ all).

example:

c://somefolder/someotherfolder/somepic.jpg  ---> c://somefolder/someotherfolder/somepic0123913123194.jpg 

is there 1-line way this, instead of me spending time handrolling procedure lastindexof, insert, etc.

a simple 1 liner be:

newfilepath = string.format("{0}{1}{2}",                             path.getfilenamewithoutextension(newfilepath),                             suffix,                             path.getextension(newfilepath)); 

edit: or preserve directory too:

newfilepath = string.format("{0}{1}{2}{3}",                             path.getdirectoryname(newfilepath),                             path.getfilenamewithoutextension(newfilepath),                             suffix,                             path.getextension(newfilepath));