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UnmanagedMemoryAccessor.Initialize Method

Sets the initial values for the accessor.

Namespace:  System.IO
Assembly:  mscorlib (in mscorlib.dll)
[<SecurityPermissionAttribute(SecurityAction.Demand, Flags = SecurityPermissionFlag.UnmanagedCode)>]
member Initialize : 
        buffer:SafeBuffer * 
        offset:int64 * 
        capacity:int64 * 
        access:FileAccess -> unit


Type: System.Runtime.InteropServices.SafeBuffer

The buffer to contain the accessor.

Type: System.Int64

The byte at which to start the accessor.

Type: System.Int64

The size, in bytes, of memory to allocate.

Type: System.IO.FileAccess

The type of access allowed to the memory. The default is ReadWrite.


offset plus capacity is greater than buffer.


buffer is a null reference (Nothing in Visual Basic).


offset or capacity is less than zero.


access is not a valid MemoryMappedFileAccess enumeration value.


offset plus capacity would wrap around the high end of the address space.

This method is called by the constructors for this class.

.NET Framework

Supported in: 4.5.1, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, 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.

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