/// <summary>
/// Adds a Serilog sink that writes <see cref="T:Serilog.Events.LogEvent">log events</see> to Azure Application Insights.
/// </summary>
/// <remarks>
/// Supported telemetry types are Traces, Dependencies, Events, Requests and Metrics for which we provide extensions on <see cref="ILogger" />.
/// </remarks>
/// <param name="loggerSinkConfiguration">The logger configuration.</param>
/// <param name="instrumentationKey">The required Application Insights key.</param>
/// <param name="restrictedToMinimumLevel">The minimum log event level required in order to write an event to the sink.</param>
/// <param name="configureOptions">The optional function to configure additional options to influence the behavior of how the telemetry is logged to Azure Application Insights.</param>
/// <exception cref="ArgumentNullException">Thrown when the <paramref name="loggerSinkConfiguration"/> is <c>null</c>.</exception>
/// <exception cref="ArgumentException">Thrown when the <paramref name="instrumentationKey"/> is blank.</exception>
public static LoggerConfiguration AzureApplicationInsights(
this LoggerSinkConfiguration loggerSinkConfiguration,
string instrumentationKey,
LogEventLevel restrictedToMinimumLevel,
Action <ApplicationInsightsSinkOptions> configureOptions)
{
Guard.NotNull(loggerSinkConfiguration, nameof(loggerSinkConfiguration), "Requires a logger configuration to add the Azure Application Insights sink to");
Guard.NotNullOrWhitespace(instrumentationKey, nameof(instrumentationKey), "Requires an instrumentation key to authenticate with Azure Application Insights while sinking telemetry");
var options = new ApplicationInsightsSinkOptions();
configureOptions?.Invoke(options);
return(loggerSinkConfiguration.ApplicationInsights(instrumentationKey, ApplicationInsightsTelemetryConverter.Create(options), restrictedToMinimumLevel));
}