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Marshal.WriteIntPtr Method (IntPtr, IntPtr)

Writes a processor native sized integer value into unmanaged memory.

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

static member WriteIntPtr : 
        ptr:IntPtr * 
        val:IntPtr -> unit

Parameters

ptr
Type: System.IntPtr

The address in unmanaged memory to write to.

val
Type: System.IntPtr

The value to write.

ExceptionCondition
AccessViolationException

ptr is not a recognized format.

-or-

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

-or-

ptr is invalid.

WriteIntPtr enables direct interaction with an unmanaged C-style IntPtr array, eliminating the expense of copying an entire unmanaged array (using Marshal.Copy) to a separate managed array before setting its element values.

Writing to unaligned memory locations is supported.

The following example demonstrates how to read and write to an unmanaged array using the ReadIntPtr and WriteIntPtr methods.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

  • SecurityCriticalAttribute 

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

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