Section 1.1: Read-Only Collections

Immutable collections are crucial for thread safety and maintaining data integrity.

var originalList = new List<string> { "Alice", "Bob", "Charlie" };

var readOnlyCollection = originalList.AsReadOnly();

Now, readOnlyCollection is immutable.

Section 1.2: Async/Await for Enhanced Responsiveness

Utilize async/await to ensure your user interface remains responsive while operations proceed asynchronously.

public async Task<string> FetchDataAsync(string url)

{

using (var httpClient = new HttpClient())

{

var response = await httpClient.GetStringAsync(url);

return response;

}

}

Section 2.1: LINQ Queries

Easily handle data manipulation using LINQ queries to improve code readability.

var scores = new int[] { 97, 92, 81, 60 };

var highScores = from score in scores

where score > 80

select score;

highScores now contains 97, 92, and 81.

Section 2.2: Null-Conditional Operator

Prevent NullReferenceException by employing the null-conditional operator for safer checks.

string[] array = null;

var length = array?.Length ?? 0;

Here, length equals 0 without causing an exception.

Section 2.3: Tuple Deconstruction

Simplify method returns by utilizing tuples and deconstruction.

public (int, string) GetPerson()

{

return (1, "John Doe");

}

var (id, name) = GetPerson();

Section 2.4: ValueTuple for Lightweight Structures

Make use of ValueTuple for temporary data storage without needing a full class or struct.

var person = (Id: 1, Name: "Jane Doe");

Console.WriteLine($"{person.Name} has ID {person.Id}");

Section 2.5: Embracing Pattern Matching

Adopt pattern matching for clearer syntax when verifying types and values.

object obj = 123;

if (obj is int i)

{

Console.WriteLine($"Integer: {i}");

}

Section 2.6: Extension Methods

Augment the capabilities of existing classes without changing their source code.

public static class StringExtensions

{

public static string Quote(this string str)

{

return $""{str}"";

}

}

var myString = "Hello, world!";

Console.WriteLine(myString.Quote());

Section 2.7: Using Declarations

Facilitate the management of disposable objects through the new using declaration.

using var streamReader = new StreamReader("file.txt");

string content = streamReader.ReadToEnd();

The StreamReader is automatically disposed of in this context.

Section 2.8: Dynamic LINQ to SQL

Dynamic LINQ allows for adaptable database queries as your application's requirements change.

using (var context = new DataContext())

{

var query = context.People.Where("City == @0 and Age > @1", "Seattle", 25);

foreach (var person in query)

{

Console.WriteLine(person.Name);

}

}

By incorporating these snippets into your regular coding practices, you can enhance both the efficiency and clarity of your code, while fully harnessing the capabilities of C# and .NET to create impactful and scalable applications. These snippets serve as a toolkit for exploring the expansive domain of .NET programming, ensuring that every line you write demonstrates your commitment to quality and professionalism.