TraceListenerCollection.Contains(TraceListener) Method

Reference

Definition

Namespace:: System.Diagnostics

Assemblies:: netstandard.dll, System.Diagnostics.TraceSource.dll

Assembly:: System.Diagnostics.TraceSource.dll

Assembly:: System.dll

Assembly:: netstandard.dll

Source:: TraceListeners.cs

Source:: TraceListeners.cs

Source:: TraceListeners.cs

Important

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Checks whether the list contains the specified listener.

public:
 bool Contains(System::Diagnostics::TraceListener ^ listener);

public bool Contains(System.Diagnostics.TraceListener? listener);

public bool Contains(System.Diagnostics.TraceListener listener);

member this.Contains : System.Diagnostics.TraceListener -> bool

Public Function Contains (listener As TraceListener) As Boolean

Parameters

listener: TraceListener

A TraceListener to find in the list.

Returns

Boolean

true if the listener is in the list; otherwise, false.

Remarks

The Contains method can confirm the existence of a TraceListener before you perform further operations.

Applies to

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0, 2.1

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