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

I saw all the answers above, yet, couldn't get the question right :)

Is there any particular reason why the following code does not meet your requirement?

string myFirstStr = GetMyFirstStrFromSomewhere();
string mySecondStr = GetMySecondStrFromSomewhere();

string result = "Enter " + myFirstStr + " " + mySecondStr + " name";