Propagators Support

src/libraries/System.Diagnostics.DiagnosticSource/ref/System.Diagnostics.DiagnosticSourceActivity.cs

@@ -253,7 +253,25 @@ public sealed class ActivityListener : IDisposable
         public System.Diagnostics.SampleActivity<string>? SampleUsingParentId { get { throw null; } set { throw null; } }
         public System.Diagnostics.SampleActivity<ActivityContext>? Sample { get { throw null; } set { throw null; } }
         public void Dispose() { throw null; }
-   }
+    }
+
+
+    public abstract class TextMapPropagator
+    {
+        public delegate void PropagatorGetterCallback(object carrier, string fieldName, out string? value, out System.Collections.Generic.IEnumerable<string>? values);
+        public abstract System.Collections.Generic.IReadOnlyCollection<string> Fields { get; }
+        public abstract bool Inject(System.Diagnostics.Activity activity, object carrier, Action<object, string, string> setter);
+        public abstract bool Inject(System.Diagnostics.ActivityContext context, object carrier, Action<object, string, string> setter);
+        public abstract bool Inject(System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<string, string?>> baggage, object carrier, Action<object, string, string> setter);
+        public abstract bool Extract(object carrier, PropagatorGetterCallback getter, out string? id, out string? state);
+        public abstract bool Extract(object carrier, PropagatorGetterCallback getter, out System.Diagnostics.ActivityContext context);
+        public abstract bool Extract(object carrier, PropagatorGetterCallback getter, out System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<string, string?>>? baggage);
+        public static TextMapPropagator Current { get; set; }
+        public static TextMapPropagator CreateLegacyPropagator() { throw null; }
+        public static TextMapPropagator CreatePassThroughPropagator() { throw null; }
+        public static TextMapPropagator CreateNoOutputPropagator() { throw null; }
+        public static TextMapPropagator CreateW3CPropagator() { throw null; }
+    }
 }
 
 namespace System.Diagnostics.Metrics

src/libraries/System.Diagnostics.DiagnosticSource/src/System.Diagnostics.DiagnosticSource.csproj

@@ -51,6 +51,7 @@
     <Compile Include="System\Diagnostics\Metrics\ObservableCounter.cs" />
     <Compile Include="System\Diagnostics\Metrics\ObservableGauge.cs" />
     <Compile Include="System\Diagnostics\Metrics\ObservableInstrument.cs" />
+    <Compile Include="System\Diagnostics\TextMapPropagator.cs" />
     <None Include="ActivityUserGuide.md" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETCoreApp'">