diff options
Diffstat (limited to 'csharp.html.markdown')
| -rw-r--r-- | csharp.html.markdown | 68 |
1 files changed, 46 insertions, 22 deletions
diff --git a/csharp.html.markdown b/csharp.html.markdown index dfdd98de..4c9e8411 100644 --- a/csharp.html.markdown +++ b/csharp.html.markdown @@ -8,6 +8,7 @@ contributors: - ["Wouter Van Schandevijl", "http://github.com/laoujin"] - ["Jo Pearce", "http://github.com/jdpearce"] - ["Chris Zimmerman", "https://github.com/chriszimmerman"] + - ["Shawn McGuire", "https://github.com/bigbash"] filename: LearnCSharp.cs --- @@ -24,10 +25,12 @@ Multi-line comments look like this /// This is an XML documentation comment which can be used to generate external /// documentation or provide context help within an IDE /// </summary> -//public void MethodOrClassOrOtherWithParsableHelp() {} +/// <param name="firstParam">This is some parameter documentation for firstParam</param> +/// <returns>Information on the returned value of a function</returns> +//public void MethodOrClassOrOtherWithParsableHelp(string firstParam) {} // Specify the namespaces this source code will be using -// The namespaces below are all part of the standard .NET Framework Class Libary +// The namespaces below are all part of the standard .NET Framework Class Library using System; using System.Collections.Generic; using System.Dynamic; @@ -45,8 +48,8 @@ using System.Data.Entity; // Using this code from another source file: using Learning.CSharp; namespace Learning.CSharp { - // Each .cs file should at least contain a class with the same name as the file - // you're allowed to do otherwise, but shouldn't for sanity. + // Each .cs file should at least contain a class with the same name as the file. + // You're allowed to do otherwise, but shouldn't for sanity. public class LearnCSharp { // BASIC SYNTAX - skip to INTERESTING FEATURES if you have used Java or C++ before @@ -210,10 +213,10 @@ on a new line! ""Wow!"", the masses cried"; // Incrementations int i = 0; Console.WriteLine("\n->Inc/Dec-rementation"); - Console.WriteLine(i++); //i = 1. Post-Incrementation - Console.WriteLine(++i); //i = 2. Pre-Incrementation - Console.WriteLine(i--); //i = 1. Post-Decrementation - Console.WriteLine(--i); //i = 0. Pre-Decrementation + Console.WriteLine(i++); //Prints "0", i = 1. Post-Incrementation + Console.WriteLine(++i); //Prints "2", i = 2. Pre-Incrementation + Console.WriteLine(i--); //Prints "2", i = 1. Post-Decrementation + Console.WriteLine(--i); //Prints "0", i = 0. Pre-Decrementation /////////////////////////////////////// // Control Structures @@ -421,7 +424,7 @@ on a new line! ""Wow!"", the masses cried"; // Item is an int Console.WriteLine(item.ToString()); } - + // YIELD // Usage of the "yield" keyword indicates that the method it appears in is an Iterator // (this means you can use it in a foreach loop) @@ -437,7 +440,7 @@ on a new line! ""Wow!"", the masses cried"; foreach (var counter in YieldCounter()) Console.WriteLine(counter); } - + // you can use more than one "yield return" in a method public static IEnumerable<int> ManyYieldCounter() { @@ -446,7 +449,7 @@ on a new line! ""Wow!"", the masses cried"; yield return 2; yield return 3; } - + // you can also use "yield break" to stop the Iterator // this method would only return half of the values from 0 to limit. public static IEnumerable<int> YieldCounterWithBreak(int limit = 10) @@ -482,7 +485,7 @@ on a new line! ""Wow!"", the masses cried"; // ?? is syntactic sugar for specifying default value (coalesce) // in case variable is null int notNullable = nullable ?? 0; // 0 - + // ?. is an operator for null-propagation - a shorthand way of checking for null nullable?.Print(); // Use the Print() extension method if nullable isn't null @@ -630,7 +633,7 @@ on a new line! ""Wow!"", the masses cried"; public static class Extensions { - // EXTENSION FUNCTIONS + // EXTENSION METHODS public static void Print(this object obj) { Console.WriteLine(obj.ToString()); @@ -692,7 +695,10 @@ on a new line! ""Wow!"", the masses cried"; public BikeBrand Brand; // After declaring an enum type, we can declare the field of this type // Decorate an enum with the FlagsAttribute to indicate that multiple values can be switched on - [Flags] // Any class derived from Attribute can be used to decorate types, methods, parameters etc + // Any class derived from Attribute can be used to decorate types, methods, parameters etc + // Bitwise operators & and | can be used to perform and/or operations + + [Flags] public enum BikeAccessories { None = 0, @@ -820,7 +826,7 @@ on a new line! ""Wow!"", the masses cried"; } // Methods can also be static. It can be useful for helper methods - public static bool DidWeCreateEnoughBycles() + public static bool DidWeCreateEnoughBicycles() { // Within a static method, we only can reference static class members return BicyclesCreated > 9000; @@ -879,8 +885,8 @@ on a new line! ""Wow!"", the masses cried"; bool Broken { get; } // interfaces can contain properties as well as methods & events } - // Class can inherit only one other class, but can implement any amount of interfaces, however - // the base class name must be the first in the list and all interfaces follow + // Classes can inherit only one other class, but can implement any amount of interfaces, + // however the base class name must be the first in the list and all interfaces follow class MountainBike : Bicycle, IJumpable, IBreakable { int damage = 0; @@ -913,17 +919,17 @@ on a new line! ""Wow!"", the masses cried"; public DbSet<Bicycle> Bikes { get; set; } } - + // Classes can be split across multiple .cs files // A1.cs - public partial class A + public partial class A { public static void A1() { Console.WriteLine("Method A1 in class A"); } } - + // A2.cs public partial class A { @@ -932,9 +938,9 @@ on a new line! ""Wow!"", the masses cried"; Console.WriteLine("Method A2 in class A"); } } - + // Program using the partial class "A" - public class Program + public class Program { static void Main() { @@ -942,6 +948,24 @@ on a new line! ""Wow!"", the masses cried"; A.A2(); } } + + // String interpolation by prefixing the string with $ + // and wrapping the expression you want to interpolate with { braces } + public class Rectangle + { + public int Length { get; set; } + public int Width { get; set; } + } + + class Program + { + static void Main(string[] args) + { + Rectangle rect = new Rectangle { Length = 5, Width = 3 }; + Console.WriteLine($"The length is {rect.Length} and the width is {rect.Width}"); + } + } + } // End Namespace ``` |