FileInfo.Open Method (FileMode)
Microsoft Silverlight will reach end of support after October 2021. Learn more.
When it is called by trusted applications, opens a file in the specified mode.
Namespace: System.IO
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Function Open ( _
mode As FileMode _
) As FileStream
public FileStream Open(
FileMode mode
)
Parameters
- mode
Type: System.IO.FileMode
A FileMode constant specifying the mode (for example, Open or Append) in which to open the file.
Return Value
Type: System.IO.FileStream
A file opened in the specified mode, with read/write access and unshared.
Exceptions
| Exception | Condition |
|---|---|
| FileNotFoundException | The file is not found. |
| UnauthorizedAccessException | The file is read-only or is a directory. |
| DirectoryNotFoundException | The specified path is invalid, such as being on an unmapped drive. |
| IOException | The file is already open. |
Remarks
Platform Notes
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Silverlight for Windows Phone
This member has a SecurityCriticalAttribute attribute on Silverlight for Windows Phone, because the attribute was present in Silverlight 3. This attribute restricts this member to internal use. Application code that uses this member throws a MethodAccessException.
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
XNA Framework
Supported in: Xbox 360, Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.