Tutorial by Examples: l

public Foo DeserializeFoo(string fileName) { var serializer = new XmlSerializer(typeof(Foo)); using (var stream = File.OpenRead(fileName)) { return (Foo)serializer.Deserialize(stream); } }

<Foo> <Dog/> </Foo> public class Foo { // Using XmlElement [XmlElement(Name="Dog")] public Animal Cat { get; set; } }

<Store> <Articles> <Product/> <Product/> </Articles> </Store> public class Store { [XmlArray("Articles")] public List<Product> Products {get; set; } }

string requestUri = "http://www.example.com"; string responseData; using (var client = new WebClient()) { responseData = client.DownloadString(requestUri); }

HttpClient is available through NuGet: Microsoft HTTP Client Libraries. string requestUri = "http://www.example.com"; string responseData; using (var client = new HttpClient()) { using(var response = client.GetAsync(requestUri).Result) { response.EnsureSuccessStatus...

string requestUri = "http://www.example.com"; string requestBodyString = "Request body string."; string contentType = "text/plain"; string requestMethod = "POST"; HttpWebRequest request = (HttpWebRequest)WebRequest.Create(requestUri) { Method = reque...

string requestUri = "http://www.example.com"; string requestBodyString = "Request body string."; string contentType = "text/plain"; string requestMethod = "POST"; byte[] responseBody; byte[] requestBodyBytes = Encoding.UTF8.GetBytes(requestBodyS...

HttpClient is available through NuGet: Microsoft HTTP Client Libraries. string requestUri = "http://www.example.com"; string requestBodyString = "Request body string."; string contentType = "text/plain"; string requestMethod = "POST"; var request = new ...

The finally { ... } block of a try-finally or try-catch-finally will always execute, regardless of whether an exception occurred or not (except when a StackOverflowException has been thrown or call has been made to Environment.FailFast()). It can be utilized to free or clean up resources acquired i...

var persons = new[] { new {Id = 1, Name = "Foo"}, new {Id = 2, Name = "Bar"}, new {Id = 3, Name = "Fizz"}, new {Id = 4, Name = "Buzz"} }; var names = persons.Select(p => p.Name); Console.WriteLine(string.Join(",", names....

This method returns an IEnumerable with all the elements that meets the lambda expression Example var personNames = new[] { "Foo", "Bar", "Fizz", "Buzz" }; var namesStartingWithF = personNames.Where(p => p.StartsWith("F")); Console.W...

var oneNumber = new[] {5}; var theOnlyNumber = oneNumber.Single(); Console.WriteLine(theOnlyNumber); //5 var numbers = new[] {1,2,3,4,5}; var theOnlyNumberSmallerThanTwo = numbers.Single(n => n < 2); Console.WriteLine(theOnlyNumberSmallerThanTwo); //1 The following throws Invalid...

var numbers = new[] {1,2,3,4,5}; var lastNumber = numbers.Last(); Console.WriteLine(lastNumber); //5 var lastEvenNumber = numbers.Last(n => (n & 1) == 0); Console.WriteLine(lastEvenNumber); //4 The following throws InvalidOperationException: var lastNegativeNumber = numbers.Last(n...

var numbers = new[] {1,2,3,4,5}; var lastNumber = numbers.LastOrDefault(); Console.WriteLine(lastNumber); //5 var lastEvenNumber = numbers.LastOrDefault(n => (n & 1) == 0); Console.WriteLine(lastEvenNumber); //4 var lastNegativeNumber = numbers.LastOrDefault(n => n < 0); Con...

var oneNumber = new[] {5}; var theOnlyNumber = oneNumber.SingleOrDefault(); Console.WriteLine(theOnlyNumber); //5 var numbers = new[] {1,2,3,4,5}; var theOnlyNumberSmallerThanTwo = numbers.SingleOrDefault(n => n < 2); Console.WriteLine(theOnlyNumberSmallerThanTwo); //1 var theOnl...

var numbers = new[] {1,2,3,4,5}; var firstNumber = numbers.FirstOrDefault(); Console.WriteLine(firstNumber); //1 var firstEvenNumber = numbers.FirstOrDefault(n => (n & 1) == 0); Console.WriteLine(firstEvenNumber); //2 var firstNegativeNumber = numbers.FirstOrDefault(n => n < ...

var numbers = new[] {1,2,3,4,5}; var allNumbersAreOdd = numbers.All(n => (n & 1) == 1); Console.WriteLine(allNumbersAreOdd); //False var allNumbersArePositive = numbers.All(n => n > 0); Console.WriteLine(allNumbersArePositive); //True Note that the All method functions by che...

For classes, interfaces, delegate, array, nullable (such as int?) and pointer types, default(TheType) returns null: class MyClass {} Debug.Assert(default(MyClass) == null); Debug.Assert(default(string) == null); For structs and enums, default(TheType) returns the same as new TheType(): struct...

The readonly keyword is a field modifier. When a field declaration includes a readonly modifier, assignments to that field can only occur as part of the declaration or in a constructor in the same class. The readonly keyword is different from the const keyword. A const field can only be initialized...

Enumerable.Select returns an output element for every input element. Whereas Enumerable.SelectMany produces a variable number of output elements for each input element. This means that the output sequence may contain more or fewer elements than were in the input sequence. Lambda expressions passe...