HttpListener.IsListening Property   
Definition
Important
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Gets a value that indicates whether HttpListener has been started.
public:
 property bool IsListening { bool get(); };
	public bool IsListening { get; }
	member this.IsListening : bool
	Public ReadOnly Property IsListening As Boolean
	Property Value
true if the HttpListener was started; otherwise, false.
Examples
The following code example demonstrates using this property to determine the listening state of an instance.
public static void DisplayPrefixesAndState(HttpListener listener)
{
    // List the prefixes to which the server listens.
    HttpListenerPrefixCollection prefixes = listener.Prefixes;
    if (prefixes.Count == 0)
    {
        Console.WriteLine("There are no prefixes.");
    }
    foreach(string prefix in prefixes)
    {
        Console.WriteLine(prefix);
    }
    // Show the listening state.
    if (listener.IsListening)
    {
        Console.WriteLine("The server is listening.");
    }
}
Public Shared Sub DisplayPrefixesAndState(ByVal listener As HttpListener)
    ' List the prefixes to which the server listens.
    Dim prefixes As HttpListenerPrefixCollection = listener.Prefixes
    If prefixes.Count = 0 Then
        Console.WriteLine("There are no prefixes.")
    End If
    For Each prefix As String In prefixes
        Console.WriteLine(prefix)
    Next
    ' Show the listening state.
    If listener.IsListening Then
        Console.WriteLine("The server is listening.")
    End If
End Sub
	Remarks
To start an HttpListener, call the Start method.