Tutorial by Examples: and

class ToyProfiler : IProfiler { public ConcurrentDictionary<Thread, object> Contexts = new ConcurrentDictionary<Thread, object>(); public object GetContext() { object ctx; if(!Contexts.TryGetValue(Thread.CurrentThread, out ctx)) ctx = null; ...

ConnectionMultiplexer conn = /* initialization */; var profiler = new ToyProfiler(); conn.RegisterProfiler(profiler); var threads = new List<Thread>(); var perThreadTimings = new ConcurrentDictionary<Thread, List<IProfiledCommand>>(); for (var i = 0; i < 16; i++) {...

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

db.StringSet("key", 11021); int i = (int)db.StringGet("key"); Or using StackExchange.Redis.Extensions: db.Add("key", 11021); int i = db.Get<int>("key");

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...

Get Instance method and invoke it using System; public class Program { public static void Main() { var theString = "hello"; var method = theString .GetType() .GetMethod("Substring", ...

public class Animal { public string Name { get; set; } } public interface INoiseMaker { string MakeNoise(); } //Note that in C#, the base class name must come before the interface names public class Cat : Animal, INoiseMaker { public Cat() { Name = "Ca...

public class LivingBeing { string Name { get; set; } } public interface IAnimal { bool HasHair { get; set; } } public interface INoiseMaker { string MakeNoise(); } //Note that in C#, the base class name must come before the interface names public class Cat : LivingBei...

interface BaseInterface {} class BaseClass : BaseInterface {} interface DerivedInterface {} class DerivedClass : BaseClass, DerivedInterface {} var baseInterfaceType = typeof(BaseInterface); var derivedInterfaceType = typeof(DerivedInterface); var baseType = typeof(BaseClass); var derived...

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...

When you want to catch an exception and do something, but you can't continue execution of the current block of code because of the exception, you may want to rethrow the exception to the next exception handler in the call stack. There are good ways and bad ways to do this. private static void AskTh...

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; };

The ConfigurationManager class supports the AppSettings property, which allows you to continue reading settings from the appSettings section of a configuration file the same way as .NET 1.x supported. app.config <?xml version="1.0" encoding="utf-8"?> <configuration&gt...

Visual Studio helps manage user and application settings. Using this approach has these benefits over using the appSettings section of the configuration file. Settings can be made strongly typed. Any type which can be serialized can be used for a settings value. Application settings can be...

A task can be created by directly instantiating the Task class... var task = new Task(() => { Console.WriteLine("Task code starting..."); Thread.Sleep(2000); Console.WriteLine("...task code ending!"); }); Console.WriteLine("Starting task..."); t...

var tasks = Enumerable.Range(1, 5).Select(n => new Task<int>(() => { Console.WriteLine("I'm task " + n); return n; })).ToArray(); foreach(var task in tasks) task.Start(); Task.WaitAll(tasks); foreach(var task in tasks) Console.WriteLine(task.Result); ...

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 ...

Type constraints are able to force a type parameter to implement a certain interface or class. interface IType; interface IAnotherType; // T must be a subtype of IType interface IGeneric<T> where T : IType { } // T must be a subtype of IType class Generic<T> where T...