Interpolated strings from regular string reference [duplicate]

Question

I have a string that looks like this:

string foobar = "foo{bar}";
string bar= "bar";
Console.WriteLine(foobar);

is there a pretty way of making foobar a interpolated string after it has been declared?

I know I can do like this, but i don't receive foobar as a interpolated string

string bar= "bar";
string foobar= $"foo{bar}";
Console.WriteLine(foobar);

or like this, but I wonder if there's a prettier way of doing it

string foobar = "foo{bar}";
string bar= "bar";
Console.WriteLine(foobar.Replace("{bar}", bar);

String interpolation is a compile time language feature. You want to use it as a runtime feature. You can use String.Format. — Tim Schmelter
– Tim Schmelter, Commented Apr 26, 2017 at 7:39

Kempeth · Accepted Answer · 2017-04-26 07:46:17Z

0

String Interpolation is compile time only because it relies on the presence of the referenced variables.

Use something like this instead:

var foo = "foo{0}";
var bar = "bar;
Console.WriteLine(String.Format(foo, bar));

answered Apr 26, 2017 at 7:46

Kempeth

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