Why string.format? [duplicate]

Question

This question already has answers here:

String output: format or concat in C#? (32 answers)

Why use String.Format? [duplicate] (7 answers)

Closed 9 years ago.

Why shouldn't we simply use

 string s=product.Name+" has been saved";

instead of:

string s=string.Format("{0} has been saved", product.Name);

Answer 1

You could do that, no one say that you cannot. But mainly for readability, the second approach is prefered. It's even more obvious as soon as you concat more than 2 strings, it gets really messy, hard to read and mantain.

Answer 2

One naive reason would be that it helps to prevent exactly the string formatting issue that you've presented in your original (unedited) question i.e.

string s=product.Name+"has been saved";

requires an extra space. The format method aids readability.

Answer 3

If you have many strings that you want to add, each + operation create new string.

For adding many strings you can use StringBuilder Class or String.Format