Avoid boxing allocation and object[] allocation in BuildTraceFileName (#21752)

diff --git a/src/System.Private.CoreLib/src/System/Diagnostics/Eventing/EventPipeController.cs b/src/System.Private.CoreLib/src/System/Diagnostics/Eventing/EventPipeController.cs
index d7a562f..aeaac8b 100644 (file)
--- a/src/System.Private.CoreLib/src/System/Diagnostics/Eventing/EventPipeController.cs
+++ b/src/System.Private.CoreLib/src/System/Diagnostics/Eventing/EventPipeController.cs
@@ -290,7 +290,7 @@ namespace System.Diagnostics.Tracing
 
         private static string BuildTraceFileName()
         {
-            return GetAppName() + "." + Win32Native.GetCurrentProcessId() + NetPerfFileExtension;
+            return GetAppName() + "." + Win32Native.GetCurrentProcessId().ToString() + NetPerfFileExtension;
         }
 
         private static string GetAppName()