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Marshal::Copy Method (array<Char>, Int32, IntPtr, Int32)

Copies data from a one-dimensional, managed character array to an unmanaged memory pointer.

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

static void Copy(
	array<wchar_t>^ source, 
	int startIndex, 
	IntPtr destination, 
	int length


Type: array<System::Char>
The one-dimensional array to copy from.
Type: System::Int32
The zero-based index in the source array where copying should start.
Type: System::IntPtr
The memory pointer to copy to.
Type: System::Int32
The number of array elements to copy.


startIndex and length are not valid.


startIndex, destination, or length is nullptr.

You can use this method to copy a subset of a one-dimensional managed array to an unmanaged C-style array.

The following example copies an array to unmanaged memory and then copies the unmanaged array back to managed memory.

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

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.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.