This documentation is archived and is not being maintained.

Marshal.Copy Method (IntPtr, IntPtr(), Int32, Int32)

Copies data from an unmanaged memory pointer to a managed IntPtr array.

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

Public Shared Sub Copy ( _
	source As IntPtr, _
	destination As IntPtr(), _
	startIndex As Integer, _
	length As Integer _


Type: System.IntPtr
The memory pointer to copy from.
Type: System.IntPtr()
The array to copy to.
Type: System.Int32
The zero-based index into the destination array where copying should start.
Type: System.Int32
The number of array elements to copy.


source, destination, startIndex, or length is Nothing.

Unmanaged, C-style arrays do not contain bounds information, which prevents the startIndex and length parameters from being validated. Therefore, the unmanaged data that corresponds to the source parameter populates the managed array regardless of its usefulness. You must initialize the managed array with the appropriate size before calling the Marshal.Copy method.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

  • SecurityCriticalAttribute 

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

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.