How to use verbatim strings with interpolation?

Question

In C# 6 there is a new feature: interpolated strings. These let you put expressions directly into code.

Rather than relying on indexes:

string s = string.Format("Adding \"{0}\" and {1} to foobar.", x, this.Y()); 

the above becomes:

string s = $"Adding \"{x}\" and {this.Y()} to foobar."; 

However, we have a lot of strings across multiple lines using verbatim strings (mainly SQL statements) like this:

string s = string.Format(@"Result... Adding ""{0}"" and {1} to foobar: {2}", x, this.Y(), x.GetLog()); 

Reverting these to regular strings seems messy:

string s = "Result...\r\n" + $"Adding \"{x}\" and {this.Y()} to foobar:\r\n" + x.GetLog().ToString(); 

How to use both verbatim and interpolated strings together?

Answer 1

You can apply both $ and @ prefixes to the same string:

string s = $@"Result... Adding ""{x}"" and {this.Y()} to foobar: {x.GetLog()}"; 

Since being introduced in C# 6, interpolated verbatim strings had to start with the tokens $@, but starting with C# 8, you can use either $@ or @$.