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WriteLine Method (Object)

Debug.WriteLine Method (Object)

Writes the value of the object's ToString method 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 ( _
	value As Object _
)

Parameters

value
Type: System.Object

An object whose name is sent to the Listeners.

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 name of the object 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(myObject As Object)
    ' Write the message if the TraceSwitch level is set to Error or higher. 
    If generalSwitch.TraceError Then
        Debug.Write("Invalid object. ")
    End If  
    ' Write a second message if the TraceSwitch level is set to Verbose. 
    If generalSwitch.TraceVerbose Then
        Debug.WriteLine(myObject)
    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

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
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