From 9665ea5af6a30c8daf50cbba05580ea9803b52ec Mon Sep 17 00:00:00 2001
From: Matthias Wolf <78562192+mawosoft@users.noreply.github.com>
Date: Tue, 21 Nov 2023 19:56:24 +0100
Subject: [PATCH] Fix regression in #20608.

Fixes regression from #20608 which mixed up use of `StringBuilder.AppendFormat` and interpolated strings, thereby passing the actual value to be formatted as the format string.

Fixes #20711.
---
 .../commands/utility/Group-Object.cs                          | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/Group-Object.cs b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/Group-Object.cs
index 0f0a99519678..1f5272589395 100644
--- a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/Group-Object.cs
+++ b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/Group-Object.cs
@@ -153,7 +153,7 @@ private static string BuildName(List<ObjectCommandPropertyValue> propValues)
 
                         foreach (object item in propertyValueItems)
                         {
-                            sb.AppendFormat(CultureInfo.CurrentCulture, $"{item}, ");
+                            sb.Append(CultureInfo.CurrentCulture, $"{item}, ");
                         }
 
                         sb = sb.Length > length ? sb.Remove(sb.Length - 2, 2) : sb;
@@ -161,7 +161,7 @@ private static string BuildName(List<ObjectCommandPropertyValue> propValues)
                     }
                     else
                     {
-                        sb.AppendFormat(CultureInfo.CurrentCulture, $"{propValuePropertyValue}, ");
+                        sb.Append(CultureInfo.CurrentCulture, $"{propValuePropertyValue}, ");
                     }
                 }
             }