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XmlWriter.WriteBinHexAsync Method (Byte[], Int32, Int32)

.NET Framework 4.6 and 4.5

Asynchronously encodes the specified binary bytes as BinHex and writes out the resulting text.

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

public virtual Task WriteBinHexAsync(
	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.

Return Value

Type: System.Threading.Tasks.Task

The task that represents the asynchronous WriteBinHex operation.

Exception Condition

An XmlWriter method was called before a previous asynchronous operation finished. In this case, InvalidOperationException is thrown with the message “An asynchronous operation is already in progress.”


An XmlWriter asynchronous method was called without setting the Async flag to true. In this case, InvalidOperationException is thrown with the message “Set XmlWriterSettings.Async to true if you want to use Async Methods.”

This is the asynchronous version of WriteBinHex, with the same functionality. To use this method, you must set the Async flag to true.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 4.5
Portable Class Library
Supported in: portable .NET platforms
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
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