/// <summary>
/// Checks this <paramref name="traceSource"/> <see cref="TraceSource.Listeners"/>
/// collection for a <see cref="TraceListener"/> that equals the given
/// <paramref name="traceListener"/> OR HAs the same <see cref="TraceListener.Name"/>.
/// </summary>
/// <param name="traceSource">Not null.</param>
/// <param name="traceListener">Not null.</param>
/// <returns>True if added.</returns>
/// <exception cref="ArgumentNullException"></exception>
public static bool TryAdd(this TraceSource traceSource, TraceListener traceListener)
{
if (traceSource == null)
{
throw new ArgumentNullException(nameof(traceSource));
}
if (traceListener == null)
{
throw new ArgumentNullException(nameof(traceListener));
}
int index = traceSource.Listeners
.OfType <TraceListener>()
.FindIndex(
listener => traceListener.Equals(listener) ||
string.Equals(traceListener.Name, listener.Name));
if (index >= 0)
{
return(false);
}
traceSource.Listeners.Add(traceListener);
return(true);
}