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WindowsRuntimeBufferExtensions.CopyTo Method (Byte[], Int32, IBuffer, UInt32, Int32)

.NET Framework 4.5

Copies bytes from the source array to the destination buffer (Windows.Storage.Streams.IBuffer), specifying the starting index in the source array, the starting index in the destination buffer, and the number of bytes to copy. The method does not update the Length property of the destination buffer.

This API is not CLS-compliant. 

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

public static void CopyTo(
	this byte[] source,
	int sourceIndex,
	IBuffer destination,
	uint destinationIndex,
	int count


Type: System.Byte[]

The array to copy data from.

Type: System.Int32

The index in source to begin copying data from.

Type: IBuffer

The buffer to copy data to.

Type: System.UInt32

The index in destination to begin copying data to.

Type: System.Int32

The number of bytes to copy.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type Byte[]. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).


source or destination is null.


count, sourceIndex, or destinationIndex is less than 0 (zero).


sourceIndex is greater than or equal to the length of source.


The number of bytes in source, beginning at sourceIndex, is less than count.


Copying count bytes, beginning at destinationIndex, would exceed the capacity of destination.

.NET Framework

Supported in: 4.5

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone Silverlight 8

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012

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

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