Parameterless Constructors in Structure C# 6.0

Introduction

The Roslyn compiler has enhanced efficiency and Microsoft has made changes to the C# version 6 accordingly. There are many updates and newer features released by Microsoft that will help programmers countlessly. On November 12, 2014 Microsoft announced the release of Visual Studio 2015 on the day of Visual Studio Connect() from New York, USA.

Microsoft announced many new features as well as enhancements with C# 6.0. So there is a new feature that is very important and enjoyable to programmers, the introduction of Parameterless Constructors in Struct types.

In the older versions of C# the structures or struct types were unable to support parameterless constructors explicitly. That was the most common drawback in the programming era but the reason for that was the syntax new sa() in C# had been used for many years.

Now it is possible to define parameterless constructors for structs in the IL. The languages C# and VB have nearly the same semantics. When consuming one, though, we mostly having the new Sa() call of the constructor instead of zero-initializing the struct. The inability to define parameterless constructors in structs has always been a bit of a pain and now it is possible to add initializers to a struct.

However the optimized result can be taken as reducing the number of new sa().

Accessibility

Accessibility becomes easy to C# and writing the parameterless constructors in the C# 6.0 version helps programmers to build new functionality using these kinds of constructors. However the use of structures is serving many sorts of codes in various projects. It is problematic to have a successful but different behavior of new Sa() depending on where you are in the code and to minimize some memory issues. To minimize this issue, we should make it so that explicit parameterless constructors must to be public. That way, if you want to replace the “default behavior” you do it everywhere.

Compatibility

However this release has introduced compatibility among compilers along with C# version 6. Now imagine the use of Access modifiers like public, private and protected. What if we use private when declaring the constructors though it can never be going to provide output because flexibility is provided in the fact that the Declaration must be public or internal. 

Older version of C# shows how to handle parameterless constructors explicitly and shown errors.



Since the code above produces the error Struct can't contains parameterless constructors this shows that in older versions that is C# 5 with visual studio 2013 Ultimate, having this error when running on C# 5 enabled the IDE but this annoyed programmers very well but now fortunately it won't.

Newer version of C# 6.0 shows the output using the same code in C# and the latest version of the enabled IDE, Visual Studio 2015 preview.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication15
{
    //first phase
    public struct MyStruct
    {
        public int x;
        public MyStruct()
        {
            x = 20;
        }
    }
    class ExampStruct
    {
        public static void DoSomething()
        {
            var MyStruct = new MyStruct();
            Console.WriteLine(MyStruct.x); // prints 20
        }
    }

    class MajorExamp
    {
        public static void DoAnotherThing()
        {
            var MyStruct = new MyStruct();
            Console.WriteLine(MyStruct.x); // prints 0 that is default value.
        }
    }

    class Test
    {
        public static void Main(string[] args)
        {
            MyStruct ss = new MyStruct();
            Console.WriteLine(ss.x);
            Console.ReadKey();
        }

    }
}

Output

The code above shows that now it supports parameterless constructors and are to be used explicitly.

Summary

This article shows the newer version updates with Parameterless Constructors that can now be used has been released by Microsoft to enhance the C# 6.0 version. The Rosyln compiler as well has been enhanced a bit that supports many functionalities and new semantics as well.