Tutorial by Examples: ha

IDBConnection db = /* ... */ var id = /* ... */ db.Execute(@"update dbo.Dogs set Name = 'Beowoof' where Id = @id", new { id });

public class IHtmlStringTypeHandler : SqlMapper.TypeHandler<IHtmlString> { public override void SetValue( IDbDataParameter parameter, IHtmlString value) { parameter.DbType = DbType.String; parameter.Value = value?.ToHtmlString(); } pu...

It is possible to use await expression to apply await operator to Tasks or Task(Of TResult) in the catch and finally blocks in C#6. It was not possible to use the await expression in the catch and finally blocks in earlier versions due to compiler limitations. C#6 makes awaiting async tasks a lot e...

<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 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 ...

using System; using System.IO; using System.Net; using System.Net.Sockets; using System.Text; class TcpChat { static void Main(string[] args) { if(args.Length == 0) { Console.WriteLine("Basic TCP chat"); Console.WriteLine(); ...

string sqrt = "\u221A"; // √ string emoji = "\U0001F601"; // 😁 string text = "\u0022Hello World\u0022"; // "Hello World" string variableWidth = "\x22Hello World\x22"; // "Hello World"

Apostrophes char apostrophe = '\''; Backslash char oneBackslash = '\\';

try { /* code that could throw an exception */ } catch (Exception ex) { /* handle the exception */ } Note that handling all exceptions with the same code is often not the best approach. This is commonly used when any inner exception handling routines fail, as a last resort.

try { /* code to open a file */ } catch (System.IO.FileNotFoundException) { /* code to handle the file being not found */ } catch (System.IO.UnauthorizedAccessException) { /* code to handle not being allowed access to the file */ } catch (System.IO.IOException) { /* cod...

// single character s char c = 's'; // character s: casted from integer value char c = (char)115; // unicode character: single character s char c = '\u0073'; // unicode character: smiley face char c = '\u263a';

Assemblies are the building block of any Common Language Runtime (CLR) application. Every type you define, together with its methods, properties and their bytecode, is compiled and packaged inside an Assembly. using System.Reflection; Assembly assembly = this.GetType().Assembly; Assembl...

// Translates to `dict.Add(1, "First")` etc. var dict = new Dictionary<int, string>() { { 1, "First" }, { 2, "Second" }, { 3, "Third" } }; // Translates to `dict[1] = "First"` etc. // Works in C# 6.0. var dict = new Dicti...

public delegate int ModifyInt(int input); ModifyInt multiplyByTwo = x => x * 2; The above Lambda expression syntax is equivalent to the following verbose code: public delegate int ModifyInt(int input); ModifyInt multiplyByTwo = delegate(int x){ return x * 2; };

using st = System.Text; //allows you to access classes within this namespace such as StringBuilder //prefixing them with only the defined alias and not the full namespace. i.e: //... var sb = new st.StringBuilder(); //instead of var sb = new System.Text.StringBuilder();

var task1 = Task.Run(() => { Console.WriteLine("Task 1 code starting..."); throw new Exception("Oh no, exception from task 1!!"); }); var task2 = Task.Run(() => { Console.WriteLine("Task 2 code starting..."); throw new Exception("Oh ...

var task1 = Task.Run(() => { Console.WriteLine("Task 1 code starting..."); throw new Exception("Oh no, exception from task 1!!"); }); var task2 = Task.Run(() => { Console.WriteLine("Task 2 code starting..."); throw new Exception("Oh ...