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+# Previews
+
+If you have purchased the Early Access Program edition of C# 11 and .NET 7 - Modern Cross-Platform Development, then note that the chapters were written and tested with .NET 7 Preview 1.
+
+Microsoft will release monthly previews until November 2022. Each month I will add new content to this page that will then be added to the final drafts for publishing in November.
+
+## New content for .NET 7 Preview 2
+
+### Chapter 1 - Command Line Interface commands
+
+In .NET 7 Preview 2 and later, `dotnet` commands do not need to be prefixed with hyphens.
+
+For example, to list the currently installed templates before:
+
+```
+dotnet new --list
+```
+
+After:
+
+```
+dotnet new list
+```
+
+> Since I want to ensure that .NET 6 developers can follow the examples in the book, and Microsoft will support the use of hyphenated commands for a while, the book will continue to use the hyphenated commands but with a note that they are optional in .NET 7 and later.
+
+### Chapter 8 - Regular Expressions
+
+In .NET 7 Preview 2 and later, you can use a more efficient Regex source generator.
+
+Before:
+
+```cs
+public class Foo
+{
+  public Regex regex = new Regex(@"abc|def", RegexOptions.IgnoreCase);
+
+  public bool Bar(string input)
+  {
+    bool isMatch = regex.IsMatch(input);
+    // ..
+  }
+}
+```
+
+After:
+
+```cs
+public partial class Foo  // <-- Make the class a partial class
+{
+  [RegexGenerator(@"abc|def", RegexOptions.IgnoreCase)] // <-- Add the RegexGenerator attribute and pass in your pattern and options
+  public static partial Regex MyRegex(); //  <-- Declare the partial method, which will be implemented by the source generator
+
+  public bool Bar(string input)
+  {
+    bool isMatch = MyRegex().IsMatch(input); // <-- Use the generated engine by invoking the partial method.
+    // ..
+  }
+}
+```