WriteBase64 Method

XmlWriter.WriteBase64 Method

When overridden in a derived class, encodes the specified binary bytes as Base64 and writes out the resulting text.

Namespace:  System.Xml
Assembly:  System.Xml (in System.Xml.dll)

public abstract void WriteBase64(
	byte[] buffer,
	int index,
	int count


Type: System.Byte[]
Byte array to encode.
Type: System.Int32
The position in the buffer indicating the start of the bytes to write.
Type: System.Int32
The number of bytes to write.


buffer is null.


index or count is less than zero.


The buffer length minus index is less than count.

For example, the byte buffer may contain the binary contents of a GIF image. This clearly would not be valid XML. The Base64 encoding is designed to represent arbitrary byte sequences in a text form comprised of the 65 US-ASCII characters ([A-Za-z0-9+/=]) where each character encodes 6 bits of the binary data. For more information, see Requests for Comments (RFC) 1521 located on the Request for Comments Web site at http://www.rfc-editor.org/.


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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