You can use System.IO.Directory.Exists( path ) - you simply need to ensure that your WCF service is operating under credentials with adequate permissions to get to the folder in question (otherwise you will encounter an exception). in this what should be the path as if i am giving the path same as what i am getting in URL it is giving me exception of URI Format are not allowed -- Abhishek Mathur Oct 2 at 9:58 @AbhishekMathur You need to convert the URL to a proper file path that is either relative to the location of your WCF service or is absolute. In any case that is a different question, try looking here on SO for previous questions about mapping a URL to a file path - it's been covered lots of times. -- slugster Oct 2 at 10:55