System.Diagnostics.Metrics.Counter<T>
Represents an instrument that supports adding non-negative values. For example, you might call counter.Add(1) each time a request is processed to track the total number of requests. Most metric viewers display counters using a rate (requests/sec), by default, but can also display a cumulative total.
namespace System.Diagnostics.Metrics
{
public sealed class Counter<T> : Instrument<T> where T : struct
{
public void Add(T delta);
public void Add(T delta, KeyValuePair<string, object> tag);
public void Add(T delta, KeyValuePair<string, object> tag1, KeyValuePair<string, object> tag2);
public void Add(T delta, KeyValuePair<string, object> tag1, KeyValuePair<string, object> tag2, KeyValuePair<string, object> tag3);
public void Add(T delta, ReadOnlySpan<KeyValuePair<string, object>> tags);
public void Add(T delta, params KeyValuePair<string, object>[] tags);
public void Add(T delta, ref TagList tagList);
}
}