how-to-write-characters-to-a-string.md

description	title	ms.date	dev_langs	helpviewer_keywords	ms.assetid
Learn more about: How to: Write characters to a string	How to: Write characters to a string	01/21/2019	csharp vb	data streams, writing characters to string writing characters to strings streams, writing characters to strings I/O [.NET], writing characters to strings	1222cbeb-0760-44bf-9888-914a2a37174b

How to: Write characters to a string

The following code examples write characters synchronously or asynchronously from a character array into a string.

Example: Write characters synchronously in a console app

The following example uses a xref:System.IO.StringWriter to write five characters synchronously to a xref:System.Text.StringBuilder object.

[!code-csharpConceptual.StringBuilder#9] [!code-vbConceptual.StringBuilder#9]

Example: Write characters asynchronously in a WPF app

The next example is the code behind a WPF app. On window load, the example asynchronously reads all characters from a xref:System.Windows.Controls.TextBox control and stores them in an array. It then asynchronously writes each letter or white-space character to a separate line of a xref:System.Windows.Controls.TextBlock control.

[!code-csharpStreamReaderWriter] [!code-vbStreamReaderWriter]

See also

• xref:System.IO.StringWriter
• xref:System.IO.StringWriter.Write%2A?displayProperty=nameWithType
• xref:System.Text.StringBuilder
• File and stream I/O
• Asynchronous file I/O
• How to: Enumerate directories and files
• How to: Read and write to a newly created data file
• How to: Open and append to a log file
• How to: Read text from a file
• How to: Write text to a file
• How to: Read characters from a string