EN CSharp Operator Interpolation

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Handbook C# · Practical Guide

Interpolation calculates insets in a string; verbatim preserves backslashes; raw-literal facilitates nested quotes and multi-line text.

Simple example (Example.cs)

Save this example separately as Example.cs. Run it independently of the other examples on this page.

Example.cs:

// PROJECT-EXAMPLE
int count = 3;
System.Console.WriteLine($"Count={count}");

Result:

Count=3

Syntax

$"{value:format}" / @"text" / """text"""

Example 1

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.IO;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;

public static class Program
{
    public static async Task Main(string[] args)
    {
        decimal amount = 12.5M;
        string text = $"Amount: {amount:F2}";
        Console.WriteLine(text);
        Console.WriteLine(@"C:\Scripts\Data");
    }
}

Example 2

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.IO;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;

public static class Program
{
    public static async Task Main(string[] args)
    {
        string json = """{"name":"ore","count":3}""";
        Console.WriteLine(json);
    }
}

Official source: Microsoft Learn.