-When an exception occurs, you can automatically collect a debug snapshot from your live web application. The snapshot shows the state of source code and variables at the moment the exception was thrown. The Snapshot Debugger (preview) in [Azure Application Insights](../../azure-monitor/app/app-insights-overview.md) monitors exception telemetry from your web app. It collects snapshots on your top-throwing exceptions so that you have the information you need to diagnose issues in production. Include the [Snapshot collector NuGet package](https://www.nuget.org/packages/Microsoft.ApplicationInsights.SnapshotCollector) in your application, and optionally configure collection parameters in [ApplicationInsights.config](../../azure-monitor/app/configuration-with-applicationinsights-config.md). Snapshots appear on [exceptions](../../azure-monitor/app/asp-net-exceptions.md) in the Application Insights portal.
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