dotnet-core/release-notes/3.0/preview/api-diff/preview5/3.0-preview5_System.Diagnostics.Tracing.md

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# System.Diagnostics.Tracing
``` diff
namespace System.Diagnostics.Tracing {
+ public abstract class DiagnosticCounter : IDisposable {
+ public DiagnosticCounter(string name, EventSource eventSource);
+ public string DisplayName { get; set; }
+ public EventSource EventSource { get; }
+ public string Name { get; }
+ public void AddMetadata(string key, string value);
+ public void Dispose();
+ }
- public class EventCounter : IDisposable {
+ public class EventCounter : DiagnosticCounter {
- public void Dispose();
+ public void WriteMetric(double value);
}
+ public class IncrementingEventCounter : DiagnosticCounter {
+ public IncrementingEventCounter(string name, EventSource eventSource);
+ public TimeSpan DisplayRateTimeScale { get; set; }
+ public void Increment(double increment = 1);
+ }
+ public class IncrementingPollingCounter : DiagnosticCounter {
+ public IncrementingPollingCounter(string name, EventSource eventSource, Func<double> totalValueProvider);
+ public TimeSpan DisplayRateTimeScale { get; set; }
+ }
+ public class PollingCounter : DiagnosticCounter {
+ public PollingCounter(string name, EventSource eventSource, Func<double> metricProvider);
+ }
}
```