Using Static Class Statements: A New Feature of C# 6.0

The second code looks much cleaner without the use of the Console class many times. The outputs of both the code snippets are the same.

This was just a simple example of using the System. Console class as a namespace, but in the .NET Framework there are multiple static classes that can be included in the using statement similar to a namespace.

Demo Application using Visual Studio 2013

using System;
using System.Collections.Generic;
namespace CSharpFeatures
{
    class usingsystemVS13
    {
        static void Main(string[] args)
        {
            Console.WriteLine("\n -- Use of System.Math Class --\n");
            int a = 10, b = 3, remainder, radius = 2;
            int answer = Math.DivRem(a, b, out remainder);   // using System.Math Class method DivRem
            Console.WriteLine(" Result of 10/3 : {0}", answer);  // using System.Console class method WriteLine
            Console.WriteLine(" Remainder of 10/3 : {0}", remainder);
            double _tan = Math.Tan(0);   // using System.Math Class method Tan
            Console.WriteLine(" Value of Tan(0) : {0}", _tan);
            double circlearea = Math.PI * Math.Pow(radius, 2);    // using System.Math Class methods PI and Pow
            Console.WriteLine(" Area of Circle when radius is {0} : {1}", radius, circlearea);
            Console.WriteLine("\n -- Use of System.Convert Class --\n");
            string number = "5";
            int convertednum = Convert.ToInt32(number);  // using System.Convert Class method ToInt32
            Console.WriteLine(" Number converted from string to int : {0}", convertednum);
            Console.ReadKey();  // using System.Console class method ReadKey
        }
    }
}

Output

Demo Application using Visual Studio 2015 Preview

using System;
using static System.Console;
using static System.Convert;
using static System.Math;
namespace CSharpFeatures
{
    class usingsystemVS15
    {
        static void Main(string[] args)
        {
            WriteLine("\n -- Use of System.Math Class --\n");
            int a = 10, b = 3, remainder, radius = 2;
            int answer = DivRem(a, b, out remainder); //using System.Math class method DivRem
            WriteLine(" Result of 10/3 : {answer}"); //using System.Console class method WriteLine
            WriteLine(" Remainder of 10/3 : {remainder}");
            double _tan = Tan(0); //using System.Math class method Tan
            WriteLine(" Value of Tan(0) : {_tan}");
            double circlearea = PI * Pow(radius, 2); //using System.Math class method PI and Pow
            WriteLine(" Area of Circle when radius is {radius} : {circlearea}");
            WriteLine("\n -- Use of System.Convert Class --\n");
            string number = "5";
            int convertednum = ToInt32(number); //using System.Convert class method ToInt32
            WriteLine(" Number converted from string to int : {convertednum}");
            ReadKey(); //using System.Console class method ReadKey
        }
    }
}

Output

Summary

In this article, we learned how to use multiple static classes that can be included in the statement similar to a namespace that makes our source code more maintained, cleaner, and readable. Don't forget to read my other articles in the series "A new feature of C# 6.0". Share your opinion about this feature and how will you use it in your project. Your comments are most welcome. Happy Coding!