3 ms·

There's no reason in principle why name + " is " + age + " years old." couldn't compile to exactly the same. (Other than maybe `string.Format` having some

• epcoa 2y ago
  Like python, and Rust with the format! macro (which doesn't even support arbitrary expressions), C# the full syntax for interpolated/formatted strings is this: {<interpolationExpression>[,<alignment>][:<formatString>]}, ie there is more going on then just a simple wrapper around concat or StringBuilder.
• ygra 2y ago
  When not using the format specifiers or alignment it will indeed compile to just string.Concat (which is also what the + operator for strings compiles to). Similar to C compilers choosing to call pits instead of printf if there is nothing to be formatted.