How to provide custom string placeholder for string format

Question

I have a string

string str =\"Enter {0} patient name\";

I am using string.format to format it.

String.Format(str, \"Hello\         


        

Answer 1

You are probably better off using Replace for the custom field and Format for the rest, like:

string str = "Enter {0} {pat} name";
String.Format(str.Replace("{pat}", "Patient"), "Hello");