classes with internal variable-definitions

Question

I found many examples with confusing class-definitions: variable-declaration and direct assignment but no standard-constructor. Are constructors needles or is this a renewal in C#6? Example: class Table { public int[] number = new number[10];}

Rajesh Singh · Answer

Hi class Table { public int[] number = new number[10];} The code above mention is using auto property initialzier and it is features C# 6.0; Property can be initialize without constructor in C# 6.0. Please see below sample code . 1. Auto Property Initialzier Before The only way to initialize an Auto Property is to implement an explicit constructor and set property values inside it. Hide Copy Code public class AutoPropertyBeforeCsharp6 { private string _postTitle = string .Empty; public AutoPropertyBeforeCsharp6() { // assign initial values PostID = 1 ; PostName =  Post 1 ; } public long PostID { get ; set ; } public string PostName { get ; set ; } public string PostTitle { get { return _postTitle; } protected set { _postTitle = value ; } } } After In C# 6 auto implemented property with initial value can be initialized without having to write the constructor. We can simplify the above example to the following: Hide Copy Code public class AutoPropertyInCsharp6 { public long PostID { get ; } = 1 ; public string PostName { get ; } =  Post 1 ; public string PostTitle { get ; protected set ; } = string .Empty; } Plz refer C# 6.0 new features. http://www.codeproject.com/Articles/874205/New-features-in-Csharp/

Francis · Answer

Are constructors needles or is this a renewal in C#6? Constructors are renewed a bit in C# 6. https://msdn.microsoft.com/en-us/magazine/dn802602.aspx Hope this helps!