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# Previews
**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.
Preliminary drafts of C# 11 and .NET 7 - Modern Cross-Platform Development were written and tested with .NET 7 Preview 1. Microsoft will release monthly previews until August, then two release candidates in September and October, before the general availablility (GA) release in November 2022. Each month I will add new content to this page that will then be added to the final drafts in September.
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](#new-content-for-net-7-preview-2)
- [Chapter 1](#chapter-1)
- [Command Line Interface commands](#command-line-interface-commands)
- [Line breaks in interpolated strings](#line-breaks-in-interpolated-strings)
- [Chapter 5](#chapter-5)
- [List pattern matching](#list-pattern-matching)
- [Chapter 8](#chapter-8)
- [Regular Expressions](#regular-expressions)
- [New content for .NET 7 Preview 3 (April)](#new-content-for-net-7-preview-3-april)
- [New content for .NET 7 Preview 4 (May)](#new-content-for-net-7-preview-4-may)
- [New content for .NET 7 Preview 5 (June)](#new-content-for-net-7-preview-5-june)
- [New content for .NET 7 Preview 6 (July)](#new-content-for-net-7-preview-6-july)
- [New content for .NET 7 Preview 7 (August)](#new-content-for-net-7-preview-7-august)
- [New content for .NET 7 Release Candidate 1 (September)](#new-content-for-net-7-release-candidate-1-september)
## New content for .NET 7 Preview 2
# New content for .NET 7 Preview 2
### Chapter 1 - Command Line Interface commands
## Chapter 1
### Command Line Interface commands
In .NET 7 Preview 2 and later, `dotnet` commands do not need to be prefixed with hyphens.
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> 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
### Line breaks in interpolated strings
One of my favorite new language features because it helps with printed code!
Before C# 11, breaking an interpolated string in the middle of the double-quotes or in the middle of a curly-brace expression gives compile errors, as shown in the following code:
```cs
string message1 = $"Total number of
fruit is {apples.Count}.";
string message2 =
$"Total number of fruit is {apples.Count
+ oranges.Count}";
```
With C# 11, the above will compile. Finally!
## Chapter 5
### List pattern matching
## Chapter 8
### Regular Expressions
In .NET 7 Preview 2 and later, you can use a more efficient Regex source generator.
@ -57,4 +95,16 @@ public partial class Foo // <-- Make the class a partial class
// ..
}
}
```
```
# New content for .NET 7 Preview 3 (April)
# New content for .NET 7 Preview 4 (May)
# New content for .NET 7 Preview 5 (June)
# New content for .NET 7 Preview 6 (July)
# New content for .NET 7 Preview 7 (August)
# New content for .NET 7 Release Candidate 1 (September)