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StreamWriter.WriteLineAsync Method (Char)
.NET Framework (current version)
Writes a character followed by a line terminator asynchronously to the stream.
Assembly: mscorlib (in mscorlib.dll)
<ComVisibleAttribute(False)> <HostProtectionAttribute(SecurityAction.LinkDemand, ExternalThreading := True)> Public Overrides Function WriteLineAsync ( value As Char ) As Task
Parameters
- value
-
Type:
System.Char
The character to write to the stream.
Return Value
Type: System.Threading.Tasks.TaskA task that represents the asynchronous write operation.
| Exception | Condition |
|---|---|
| ObjectDisposedException | The stream writer is disposed. |
| InvalidOperationException | The stream writer is currently in use by a previous write operation. |
The line terminator is defined by the TextWriter.NewLine property.
The following example shows how to write a single character (the letter "a") to a line in a text file, followed by another line that contains a single character (the letter "b"), by using the WriteLineAsync(Char) method.
Imports System.IO Imports System.Text Module Module1 Sub Main() WriteCharacters() End Sub Async Sub WriteCharacters() Dim firstChar As Char = "a" Dim secondChar As Char = "b" Using writer As StreamWriter = File.CreateText("newfile.txt") Await writer.WriteLineAsync(firstChar) Await writer.WriteLineAsync(secondChar) End Using End Sub End Module
Universal Windows Platform
Available since 8
.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
Available since 8
.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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