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Marshal.ReadInt64 Method (Object, Int32)

Note: This API is now obsolete.

Reads a 64-bit signed integer at a given offset from unmanaged memory.

Namespace:  System.Runtime.InteropServices
Assemblies:   System.Runtime.InteropServices (in System.Runtime.InteropServices.dll)
  mscorlib (in mscorlib.dll)

[<ObsoleteAttribute("ReadInt64(Object, Int32) may be unavailable in future releases.")>]
static member ReadInt64 : 
        ptr:Object * 
        ofs:int -> int64

Parameters

ptr
Type: System.Object

The base address in unmanaged memory of the source object.

ofs
Type: System.Int32

An additional byte offset, which is added to the ptr parameter before reading.

Return Value

Type: System.Int64
The 64-bit signed integer read from unmanaged memory at the given offset.

ExceptionCondition
AccessViolationException

Base address (ptr) plus offset byte (ofs) produces a null or invalid address.

ArgumentException

ptr is an ArrayWithOffset object. This method does not accept ArrayWithOffset parameters.

ReadInt64 enables direct interaction with an unmanaged 64-bit signed array, eliminating the expense of copying an entire unmanaged array (using Marshal.Copy) to a separate managed array before reading its element values.

Reading from unaligned memory locations is supported.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1
Obsolete (compiler warning) in 4.6

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Obsolete (compiler warning) in Windows Phone 8.1

  • SecurityCriticalAttribute 

    requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.

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