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    <p>Assuming that the file/directory actually exists, you can use the two static methods:</p> <ul> <li><a href="http://msdn.microsoft.com/en-us/library/system.io.file.exists.aspx" rel="nofollow noreferrer">System.IO.File.Exists()</a></li> <li><a href="http://msdn.microsoft.com/en-us/library/system.io.directory.exists.aspx" rel="nofollow noreferrer">System.IO.Directory.Exists()</a></li> </ul> <p>Both accept a single string argument and returns a boolean value if the file/directory exists.</p> <p>Another case is when you have a path that <em>does not</em> refer to an existing file/directory in the file system - maybe it points to some kind of "virtual file/directory" in a database, or the path points to a file/directory that used to exists, but is now (possibly) deleted. In this case, you will have to define the distinction of "file like paths" and "directory like paths" yourself. I can think of two approaches:</p> <ul> <li>A: Directory paths ends with a directory seperator (as suggested by Wael Dalloul)</li> <li>B: File paths have an extension seperator in their last path token</li> </ul> <p>Lets test the two approaches on a couple of sample input strings:</p> <ul> <li><code>c:\windows\</code> is a directory in both cases</li> <li><code>c:\windows</code> is a directory only when using approach B</li> <li><code>c:\windows\notepad.exe</code> is a file in both cases</li> <li><code>c:\windows\system32\drivers\etc\hosts</code> is a file only in approach A</li> </ul> <p>As pointed out by these examples, none of the two approaches are guaranteed to give the expected answers in all cases, <em>unless</em> you are able to control exactly how the paths are designed from the beginning.</p>
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    1. POC# .NET - Is a deleted path a directory or file
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    1. USJørn Schou-Rode
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    1. COi have only a string. it is Dir or file? can not use Exist()
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    2. CO@Ashish: both of the static methods mentioned in my answer takes exactly one string as argument.
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