String Interpolation with format variable

Question

I can do this:

var log = string.Format(\"URL: {0}\", url);

or even like this

var format = \"URL: {0}\";
...
var log = strin         


        

Answer 1

One approach to work around that would be to use a lambda containing the interpolated string. Something like:

Func formatter = url => $"URL: {url}";
...
var googleUrl = "http://google.com";
...
var log = formatter(googleUrl);

In C# 7.0, you could use a local function instead of a lambda, to make the code slightly simpler and more efficient:

string formatter(string url) => $"URL: {url}";
...
var googleUrl = "http://google.com";
...
var log = formatter(googleUrl);