diff --git a/src/Chapter22/Listing22.01.UnsychronizedState.cs b/src/Chapter22/Listing22.01.UnsychronizedState.cs
index 04e5c28b7..c8a7b1e1b 100644
--- a/src/Chapter22/Listing22.01.UnsychronizedState.cs
+++ b/src/Chapter22/Listing22.01.UnsychronizedState.cs
@@ -13,7 +13,7 @@ public static int Main(string[] args)
     {
         if (args?.Length > 0) { _ = int.TryParse(args[0], out _Total); }
 
-        Console.WriteLine($"Increment and decrementing " +
+        Console.WriteLine("Increment and decrementing " +
             $"{_Total} times...");
 
         // Use Task.Factory.StartNew for .NET 4.0
diff --git a/src/Chapter22/Listing22.02.UnsychronizedLocalVariables.cs b/src/Chapter22/Listing22.02.UnsychronizedLocalVariables.cs
index e39c4936e..f954e645b 100644
--- a/src/Chapter22/Listing22.02.UnsychronizedLocalVariables.cs
+++ b/src/Chapter22/Listing22.02.UnsychronizedLocalVariables.cs
@@ -10,7 +10,7 @@ public static int Main(string[] args)
     {
         int total = int.MaxValue;
         if (args?.Length > 0) { _ = int.TryParse(args[0], out total); }
-        Console.WriteLine($"Increment and decrementing " +
+        Console.WriteLine("Increment and decrementing " +
             $"{total} times...");
         int x = 0;
         Parallel.For(0, total, i =>
diff --git a/src/Chapter22/Listing22.03.SynchronizingWithMonitor.cs b/src/Chapter22/Listing22.03.SynchronizingWithMonitor.cs
index 7ac001954..c182a4948 100644
--- a/src/Chapter22/Listing22.03.SynchronizingWithMonitor.cs
+++ b/src/Chapter22/Listing22.03.SynchronizingWithMonitor.cs
@@ -16,7 +16,7 @@ public class Program
     public static int Main(string[] args)
     {
         if (args?.Length > 0) { _ = int.TryParse(args[0], out _Total); }
-        Console.WriteLine($"Increment and decrementing " +
+        Console.WriteLine("Increment and decrementing " +
             $"{_Total} times...");
 
         // Use Task.Factory.StartNew for .NET 4.0
diff --git a/src/Chapter22/Listing22.04.SynchronizingWithLockKeyword.cs b/src/Chapter22/Listing22.04.SynchronizingWithLockKeyword.cs
index bb81b14d3..3603e9183 100644
--- a/src/Chapter22/Listing22.04.SynchronizingWithLockKeyword.cs
+++ b/src/Chapter22/Listing22.04.SynchronizingWithLockKeyword.cs
@@ -15,7 +15,7 @@ public class Program
     public static int Main(string[] args)
     {
         if (args?.Length > 0) { _ = int.TryParse(args[0], out _Total); }
-        Console.WriteLine($"Increment and decrementing " +
+        Console.WriteLine("Increment and decrementing " +
             $"{_Total} times...");
 
         // Use Task.Factory.StartNew for .NET 4.0
diff --git a/src/Chapter22/Listing22.05.AsyncMain.cs b/src/Chapter22/Listing22.05.AsyncMain.cs
index dcca05bb8..9749e3c81 100644
--- a/src/Chapter22/Listing22.05.AsyncMain.cs
+++ b/src/Chapter22/Listing22.05.AsyncMain.cs
@@ -15,7 +15,7 @@ public static async Task<int> Main(string[] args)
     #endregion HIGHLIGHT
     {
         if (args?.Length > 0) { _ = int.TryParse(args[0], out _Total); }
-        Console.WriteLine($"Increment and decrementing " +
+        Console.WriteLine("Increment and decrementing " +
             $"{_Total} times...");
 
         // Use Task.Factory.StartNew for .NET 4.0