Use StringBuilder.Append(Char) instead of converting char to string (#32686)

* Use StringBuilder.Append(Char) instead of converting char to string

* revert unused local removal

diff --git a/src/libraries/System.DirectoryServices.AccountManagement/src/System/DirectoryServices/AccountManagement/SAM/SAMUtils.cs b/src/libraries/System.DirectoryServices.AccountManagement/src/System/DirectoryServices/AccountManagement/SAM/SAMUtils.cs
index c319be5..54a65cb 100644 (file)
--- a/src/libraries/System.DirectoryServices.AccountManagement/src/System/DirectoryServices/AccountManagement/SAM/SAMUtils.cs
+++ b/src/libraries/System.DirectoryServices.AccountManagement/src/System/DirectoryServices/AccountManagement/SAM/SAMUtils.cs
@@ -169,7 +169,7 @@ namespace System.DirectoryServices.AccountManagement
                             break;
 
                         default:
-                            sb.Append(c.ToString());   //   x  --> x
+                            sb.Append(c);   //   x  --> x
                             break;
                     }
                 }
@@ -197,7 +197,7 @@ namespace System.DirectoryServices.AccountManagement
 
                         default:
                             sb.Append(@"\\");
-                            sb.Append(c.ToString());    //      \x --> \x
+                            sb.Append(c);    //      \x --> \x
                             break;
                     }
                 }