Insert variable values in the middle of a string

Question

In C#: If I want to create a message like this: \"Hi We have these flights for you: Flight A,B,C,D. Which one do you want\"

where just the section i

Answer 1

1 You can use string.Replace method

var sample = "testtesttesttest#replace#testtesttest";
var result = sample.Replace("#replace#", yourValue);

2 You can also use string.Format

var result = string.Format("your right part {0} Your left Part", yourValue);

3 You can use Regex class