Fix minor typo in comment. (#35768)

diff --git a/src/libraries/System.Diagnostics.DiagnosticSource/src/System/Diagnostics/Activity.cs b/src/libraries/System.Diagnostics.DiagnosticSource/src/System/Diagnostics/Activity.cs
index 07f717e..0129c66 100644 (file)
--- a/src/libraries/System.Diagnostics.DiagnosticSource/src/System/Diagnostics/Activity.cs
+++ b/src/libraries/System.Diagnostics.DiagnosticSource/src/System/Diagnostics/Activity.cs
@@ -1472,7 +1472,7 @@ namespace System.Diagnostics
         }
 
         /// <summary>
-        /// Returns the TraceId as a 16 character hexadecimal string.
+        /// Returns the SpanId as a 16 character hexadecimal string.
         /// </summary>
         /// <returns></returns>
         public string ToHexString()