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UnmanagedMemoryAccessor Constructor (SafeBuffer, Int64, Int64, FileAccess)

Initializes a new instance of the UnmanagedMemoryAccessor class with a specified buffer, offset, capacity, and access right.

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

public:
UnmanagedMemoryAccessor(
	SafeBuffer^ buffer, 
	long long offset, 
	long long capacity, 
	FileAccess access
)

Parameters

buffer
Type: System.Runtime.InteropServices::SafeBuffer

The buffer to contain the accessor.

offset
Type: System::Int64

The byte at which to start the accessor.

capacity
Type: System::Int64

The size, in bytes, of memory to allocate.

access
Type: System.IO::FileAccess

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

ExceptionCondition
ArgumentException

offset plus capacity is greater than buffer.

ArgumentNullException

buffer is nullptr.

ArgumentOutOfRangeException

offset or capacity is less than zero.

-or-

access is not a valid MemoryMappedFileAccess enumeration value.

InvalidOperationException

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

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4

.NET Framework Client Profile

Supported in: 4

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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