How should I concatenate strings?

Question

Are there differences between these examples? Which should I use in which case?

var str1 = \"abc\" + dynamicString + dynamicString2;

var str2 = String.Form         


        

Answer 1

Use the + operator in your scenario.

I would only use the String.Format() method when you have a mix of variable and static data to hold in your string. For example:

string result=String.Format(
    "Today {0} scored {1} {2} and {3} points against {4}",..);

//looks nicer than
string result = "Today " + playerName + " scored " + goalCount + " " + 
    scoreType + " and " + pointCount + " against " + opposingTeam;

I don't see the point of using a StringBuilder, since you're already dealing with three string literals.

I personally only use Concat when dealing with a String array.