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IsolatedStorageFile.FileExists Method

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Determines whether the specified path refers to an existing file in the isolated store.

Namespace:  System.IO.IsolatedStorage
Assembly:  mscorlib (in mscorlib.dll)

public bool FileExists(
	string path


Type: System.String
The path and file name to test.

Return Value

Type: System.Boolean
true if path refers to an existing file in the isolated store and is not null; otherwise, false.


The isolated store has been removed.


Isolated storage is disabled.


The isolated store has been disposed.

The following example determines whether a file exists before writing to it. This example is part of a larger example provided for IsolatedStorageFile class.

// Write to an existing file: MyApp1\SubDir1\MyApp1A.txt

// Determine if the file exists before writing to it.
string filePath = Path.Combine(subdirectory1, "MyApp1A.txt");

if (store.FileExists(filePath))
        using (StreamWriter sw =
            new StreamWriter(store.OpenFile(filePath,
                FileMode.Open, FileAccess.Write)))
            sw.WriteLine("To do list:");
            sw.WriteLine("1. Buy supplies.");
    catch (IsolatedStorageException ex)


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone