String Interpolation in C#

How do you use string interpolation in C#? This video shows you how to convert string.Format into string interpolation introduced in C# 6.0.
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[@FilipEkberg]

Font size will definitely be improved in upcoming videos to make it easier to watch on mobile!

[@labidizouhaier6348]

Thank you it's very helpful

[@arturoordonez-hernandez1534]

So, if I'm understanding this correctly, we can say the $ is an overloaded operator shorthand way of using C#'s string.Format() function.

[@FilipEkberg]

Correct!

[@arturoordonez-hernandez1534]

@@FilipEkberg I kept wondering if this existed. I was like "I know Python and JS have this, there must be some way C# does this kind of thing." I think most of the web apps we support where I work are on C# 5, so I'll still have to use string.Format there for the time being.

[@winxclub4032]

Hey filip! i also used interpolation in my application. Apart from that i have a query , if you could help me out in that!.
I have a scenario:
I have a session variable named as Session["regno"] = "xyz-123" (and the values can be changed). which is further a part of SMS Text to be broadcasted to end user.
"Dear User, your reg No is Session["regno"].toString()"
To avoid the hard code approach i have stored the above text into a database table and calling back the text using stored procedure and further storing it in a datatable like below:
SMSContent = dtSMSTemplateContent.Rows[0][0].ToString(); //dtSMSTemplateContent is returning the tuple which is a correct manner.
THE PROBLEM IS:
When i am trying to send the text statement; it is:
*Dear User, your reg No is Session["regno"].toString()*
rather than it should be
*Dear User, your reg No is xyz-123*

[@FilipEkberg]

Hi, you could use simple string formatting.
Change the content in the database to "Dear User, your reg No is {0}" and when you construct the string in your application you do the following:
var content = string.Format(SMSContent, Session["regno"].toString());
Hope this helps