diff --git a/src/libraries/System.DirectoryServices.AccountManagement/src/System/DirectoryServices/AccountManagement/AD/ADStoreCtx_LoadStore.cs b/src/libraries/System.DirectoryServices.AccountManagement/src/System/DirectoryServices/AccountManagement/AD/ADStoreCtx_LoadStore.cs
index c0e4c99e7fa7d..f27aad7412f00 100644
--- a/src/libraries/System.DirectoryServices.AccountManagement/src/System/DirectoryServices/AccountManagement/AD/ADStoreCtx_LoadStore.cs
+++ b/src/libraries/System.DirectoryServices.AccountManagement/src/System/DirectoryServices/AccountManagement/AD/ADStoreCtx_LoadStore.cs
@@ -630,7 +630,7 @@ private Principal FindPrincipalByIdentRefHelper(
 
                     innerLdapFilter.Append(')');
 
-                    ldapFilter.Append(innerLdapFilter.ToString());
+                    ldapFilter.Append(innerLdapFilter);
                 }
 
                 // Wrap off the filter
diff --git a/src/libraries/System.DirectoryServices/src/Interop/AdsValueHelper2.cs b/src/libraries/System.DirectoryServices/src/Interop/AdsValueHelper2.cs
index 9bf258bf70e27..1579abce666c5 100644
--- a/src/libraries/System.DirectoryServices/src/Interop/AdsValueHelper2.cs
+++ b/src/libraries/System.DirectoryServices/src/Interop/AdsValueHelper2.cs
@@ -153,7 +153,7 @@ public object GetValue()
                         strb.Append("B:");
                         strb.Append(binaryPart.Length);
                         strb.Append(':');
-                        strb.Append(binaryPart.ToString());
+                        strb.Append(binaryPart);
                         strb.Append(':');
                         strb.Append(Marshal.PtrToStringUni(dnb.pszDNString));