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FileStream::Unlock Method

Allows access by other processes to all or part of a file that was previously locked.

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

virtual void Unlock(
	long long position, 
	long long length


Type: System::Int64
The beginning of the range to unlock.
Type: System::Int64
The range to be unlocked.


position or length is negative.

For a list of common I/O tasks, see Common I/O Tasks.

This code example is part of a larger example provided for the Lock method.

// Unlock the specified part of the file.
case 'U':
      fileStream->Unlock( textLength - 1, byteCount );
      Console::WriteLine( "The specified part "
      "of file has been unlocked." );
   catch ( IOException^ e ) 
      Console::WriteLine( "{0}: The specified part of file is "
      "not locked by the current process.", e->GetType()->Name );



.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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