Copy Method (IntPtr, IntPtr[], Int32, Int32)

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 static function Copy(
	source : IntPtr, 
	destination : IntPtr[], 
	startIndex : int, 
	length : int


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 array where Copy should start.

Type: System.Int32

The number of array elements to copy.


source, destination, startIndex, or length is a null reference (Nothing in Visual Basic).

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


This method uses SecurityAction.LinkDemand to prevent it from being called from untrusted code; only the immediate caller is required to have SecurityPermissionAttribute.UnmanagedCode permission. If your code can be called from partially trusted code, do not pass user input to Marshal class methods without validation. For important limitations on using the LinkDemand member, see Demand vs. LinkDemand.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0

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