diff --git a/src/Chapter05/Listing05.30.RethrowingAnException.cs b/src/Chapter05/Listing05.30.RethrowingAnException.cs
index c8555a349..65bf53add 100644
--- a/src/Chapter05/Listing05.30.RethrowingAnException.cs
+++ b/src/Chapter05/Listing05.30.RethrowingAnException.cs
@@ -17,7 +17,7 @@ public static void Main()
         catch (FormatException exception)
         {
             Console.WriteLine(
-                "A FormateException was thrown");
+                "A FormatException was thrown");
         }
         #region INCLUDE
         // ...
diff --git a/src/Chapter06/Listing06.06.AccessingFields.cs b/src/Chapter06/Listing06.06.AccessingFields.cs
index 7bc5c8a6d..ecf72ac02 100644
--- a/src/Chapter06/Listing06.06.AccessingFields.cs
+++ b/src/Chapter06/Listing06.06.AccessingFields.cs
@@ -18,10 +18,10 @@ public static void Main()
         employee1.Salary = "Too Little";
         IncreaseSalary(employee1);
         Console.WriteLine(
-            "{0} {1}: {2}",
-            employee1.FirstName,
-            employee1.LastName,
-            employee1.Salary);
+           $"{ 
+            employee1.FirstName } { 
+            employee1.LastName }: { 
+            employee1.Salary }");
         #endregion HIGHLIGHT
         // ...
     }
diff --git a/src/Chapter06/Listing06.39.DisablingRequiredObjectInitialization.cs b/src/Chapter06/Listing06.39.DisablingRequiredObjectInitialization.cs
index 883411e6e..6dd35fca7 100644
--- a/src/Chapter06/Listing06.39.DisablingRequiredObjectInitialization.cs
+++ b/src/Chapter06/Listing06.39.DisablingRequiredObjectInitialization.cs
@@ -41,8 +41,7 @@ public required string Title
         }
         set
         {
-            ArgumentException.ThrowIfNullOrEmpty(
-                value = value?.Trim()!);
+            ArgumentException.ThrowIfNullOrEmpty(value);
             _Title = value;
         }
     }
@@ -56,8 +55,7 @@ public required string Isbn
         }
         set
         {
-            ArgumentException.ThrowIfNullOrEmpty(
-                value = value?.Trim()!);
+            ArgumentException.ThrowIfNullOrEmpty(value);
             _Isbn = value;
         }
     }