Easy String Interpolation in C# 6.0

Content

As we all know Microsoft has launched a new version of C# called C# 6.0 with Visual Studio Ultimate 2015 Preview and there is a new feature in C# 6.0 that is based on "String interpolation".

This feature allows us to eliminate the use of "string.Format()" or formatted syntax where we can replace each format item in a specified string with the text equivalent of a corresponding object's value like:

string.Format("{0} {1}",arg0, arg1);

or

Console.WriteLine("{0} {1}",arg0, arg1);

Let's first see the old feature.

I am using Visual Studio Ultimate 2015 Preview.



Open Visual Studio 2015 and select "File" -> "New" -> "Project" and fill in the project name such as "Console Application1".



After creating the project, I will access some common static methods in "program.cs" without the help of a class name every time.

Now I will write some code that will print the string value in a formatted way.

Code

class Program
{
    static void Main(string[] args)
    {
        string FirstName = "Rahul";
        string LastName = "Bansal";

        string PrintString = string.Format("My First Name is {0}
Last Name is {1}",FirstName, LastName);

        Console.WriteLine(PrintString);

        Console.ReadKey();

    }
}

Note: Here I am creating a formatted string using "string.Format()" that will replace each format item in the specified string on the basis of object sequence.



Output:



But in C# 6.0, we can get the same result without using "string.Format()" more easily where we can put the object in the string directly.

Syntax: "\{arg0}"

class Program
{
    static void Main(string[] args)
    {
        string FirstName = "Rahul";
        string LastName = "Bansal";

        string PrintString = "My First Name is \{FirstName} and Last Name is \{LastName}";

        Console.WriteLine(PrintString);

        Console.ReadKey();

    }
}

That will provide the same result.

Output



Conclusion

Now you understand the new feature of C# 6.0 that allows the use of "String interpolation" in an easy way.