IsolatedStorageFileStream Constructor (String, FileMode, FileAccess, IsolatedStorageFile)

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

Initializes a new instance of the IsolatedStorageFileStream class giving access to the file designated by path in the specified mode, with the specified file access, and in the context of the IsolatedStorageFile specified by isf.

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


Public Sub New ( _
    path As String, _
    mode As FileMode, _
    access As FileAccess, _
    isf As IsolatedStorageFile _
public IsolatedStorageFileStream(
    string path,
    FileMode mode,
    FileAccess access,
    IsolatedStorageFile isf



Exception Condition

isf has been disposed.


path is badly formed.


path is nullNothingnullptra null reference (Nothing in Visual Basic).


isf is nullNothingnullptra null reference (Nothing in Visual Basic).


The directory in path does not exist.


No file was found and the mode is set to Open.

Version Information

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0


Windows Phone

See Also


IsolatedStorageFileStream Class

IsolatedStorageFileStream Overload

System.IO.IsolatedStorage Namespace