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StopBits Enumeration

Specifies the number of stop bits used on the SerialPort object.

Namespace: System.IO.Ports
Assembly: System (in system.dll)

public enum StopBits
public enum StopBits
public enum StopBits

 Member nameDescription
Supported by the .NET Compact FrameworkNoneNo stop bits are used. This value is not supported. Setting the StopBits property to None raises an ArgumentOutOfRangeException
Supported by the .NET Compact FrameworkOneOne stop bit is used. 
Supported by the .NET Compact FrameworkOnePointFive1.5 stop bits are used. 
Supported by the .NET Compact FrameworkTwoTwo stop bits are used. 

This enumeration specifies the number of stop bits to use. Stop bits separate each unit of data on an asynchronous serial connection. They are also sent continuously when no data is available for transmission.

The None option is not supported. Setting the StopBits property to None raises an ArgumentOutOfRangeException.

The following code example displays the possible values of the StopBits enumeration to the console, then prompts the user to choose one. This code example is part of a larger code example provided for the SerialPort class.

public static StopBits SetPortStopBits(StopBits defaultPortStopBits)
    string stopBits;

    Console.WriteLine("Available Stop Bits options:");
    foreach (string s in Enum.GetNames(typeof(StopBits)))
        Console.WriteLine("   {0}", s);

    Console.Write("Stop Bits({0}):", defaultPortStopBits.ToString());
    stopBits = Console.ReadLine();

    if (stopBits == "")
        stopBits = defaultPortStopBits.ToString();

    return (StopBits)Enum.Parse(typeof(StopBits), stopBits);

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

.NET Compact Framework

Supported in: 2.0