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Debug.WriteLine Method (String)

Writes a message followed by a line terminator to the trace listeners in the Listeners collection.

Namespace:  System.Diagnostics
Assemblies:   System.Diagnostics.Debug (in System.Diagnostics.Debug.dll)
  System (in System.dll)

'Declaration
<ConditionalAttribute("DEBUG")> _
Public Shared Sub WriteLine ( _
	message As String _
)

Parameters

message
Type: System.String

A message to write.

By default, the output is written to an instance of DefaultTraceListener.

This method calls the WriteLine method of the trace listener.

The following example creates a TraceSwitch named generalSwitch. This switch is set outside of the code sample.

If the switch is set to the TraceLevel Error or higher, the example outputs the first error message to the Listeners. For information on adding a listener to the Listeners collection, see the TraceListenerCollection class.

Then, if the TraceLevel is set to Verbose, the example outputs the second error message on the same line as the first message. A line terminator follows the second message.

' Class-level declaration. 
' Create a TraceSwitch. 
Private Shared generalSwitch As New TraceSwitch("General", "Entire Application")


Public Shared Sub MyErrorMethod()
    ' Write the message if the TraceSwitch level is set to Error or higher. 
    If generalSwitch.TraceError Then
        Debug.Write("My error message. ")
    End If  
    ' Write a second message if the TraceSwitch level is set to Verbose. 
    If generalSwitch.TraceVerbose Then
        Debug.WriteLine("My second error message.")
    End If 
End Sub 'MyErrorMethod 

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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