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CSharp6

August 23, 2017 22:20

Top 10 new features of C# 6.0

– Auto Property Initializer
– Await in a Catch and Finally Block in C#6.0
– Dictionary Initializers in C# 6.0
– Exception Filters in C#6.0
– Expression Bodied Function & Property in C#6.0
– Getter-only Auto Properties in C#6.0
– NameOf Expression in C#6.0
– Null Conditional Operator in C#6.0
– Static Using Syntax in C#6.0
– String Interpolation in C#6.0

 C#6.0 new features

http://www.csharpstar.com/top-10-new-features-of-csharp6/

1. Static Using Syntax:

using static System.Console;
namespace CsharpStar
{
    class Program
    {
        static void Main(string[] args)
        {
            WriteLine("Hello World!");
        }
    }
}

2. String Interpolation:

class Program
{
    static void Main(string[] args)
    {
        string firstName = "Lana";
        string lastName = "Leonard";

        WriteLine($"{firstName} {lastName} is my name!");

        ReadLine();
    }
}

3. Exception Filters:

    class Program
    {
        static void Main(string[] args)
        {
            var httpStatusCode = 404;
            Write("HTTP Error: ");
 
            try
            {
                throw new Exception(httpStatusCode.ToString());
            }
            catch (Exception ex)
            {
                if (ex.Message.Equals("500"))
                    Write("Bad Request");
                else if (ex.Message.Equals("401"))
                    Write("Unauthorized");
                else if (ex.Message.Equals("402"))
                    Write("Exception Occurred");
                else if (ex.Message.Equals("403"))
                    Write("Forbidden");
                else if (ex.Message.Equals("404"))
                    Write("Not Found");
            }
 
            ReadLine();
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            var httpStatusCode = 404;
            Write("HTTP Error: ");
 
            try
            {
                throw new Exception(httpStatusCode.ToString());
            }
            catch (Exception ex) when (ex.Message.Equals("400"))
            {
                Write("Bad Request");
                ReadLine();
            }
            catch (Exception ex) when (ex.Message.Equals("401"))
            {
                Write("Unauthorized");
                ReadLine();
            }
            catch (Exception ex) when (ex.Message.Equals("402"))
            {
                Write("Exception Occurred ");
                ReadLine();
            }
            catch (Exception ex) when (ex.Message.Equals("403"))
            {
                Write("Forbidden");
                ReadLine();
            }
            catch (Exception ex) when (ex.Message.Equals("404"))
            {
                Write("Not Found");
                ReadLine();
            }
 
            ReadLine();
        }
    }

5. Null Conditional Operator:

Console.WriteLine(Emp?.Name ?? "Field is null.");

6. Auto Property Initializer:

    public class Employee
    {
        public Guid EmployeeID { get; set; } = Guid.NewGuid();
    }

7. Dictionary Initializers:

    class Program
    {
        static void Main(string[] args)
        {
            var Books = new Dictionary<int, string> ()
            {
                [1] = "ASP.net",
                [2] = "C#",
                [3] = "ASP.net MVC5"
            };
 
            foreach (KeyValuePair<int, string> keyValuePair in Books)
            {
                WriteLine(keyValuePair.Key + ": " +
                keyValuePair.Value + "\n");
            }
 
            ReadLine();
        }
    }

8. Expression Bodied Function & Property:

    class Program
    {
        private static double AddNumbers
                         (double num1, double num2)
                           => num1 + num2;
 
        static void Main(string[] args)
        {
            double num1 = 3;
            double num2 = 7;
 
            WriteLine(AddNumbers(num1, num2));
            ReadLine();
        }
    }

9. Getter-only Auto Properties:

public DateTime BirthDate { get; }

10. NameOf Expression:

if (newTitle == null) throw new Exception(nameof(newTitle) " is null");

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