File.ReadAllBytes Method
Opens a binary file, reads the contents of the file into a byte array, and then closes the file.
Namespace: System.IO
Assembly: mscorlib (in mscorlib.dll)
Parameters
- path
- Type: System.String
The file to open for reading.
| Exception | Condition |
|---|---|
| ArgumentException | path is a zero-length string, contains only white space, or contains one or more invalid characters as defined by InvalidPathChars. |
| ArgumentNullException | path is null. |
| PathTooLongException | The specified path, file name, or both exceed the system-defined maximum length. For example, on Windows-based platforms, paths must be less than 248 characters, and file names must be less than 260 characters. |
| DirectoryNotFoundException | The specified path is invalid (for example, it is on an unmapped drive). |
| IOException | An I/O error occurred while opening the file. |
| UnauthorizedAccessException | This operation is not supported on the current platform. -or- path specified a directory. -or- The caller does not have the required permission. |
| FileNotFoundException | The file specified in path was not found. |
| NotSupportedException | path is in an invalid format. |
| SecurityException | The caller does not have the required permission. |
- FileIOPermission
for access to read from a file or directory. Associated enumeration: FileIOPermissionAccess.Read
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
