In Objective-C there is a method on NSArray which lets us join all elements by a string, so all the strings in the array will be joined by that string.
NSArray* arr = @[@"Hello", @"world"];
NSString* mystring = [arr componentsJoinedByString:@" "];
Any similar thing for something like a List in C#?
Yes, you can use string.Join
var mystring = string.Join(" ", myArray);
Sure, but it's on the String class in C#:
var arr = new[] { "Hello", "world" };
var mystring = String.Join(" ", arr);
This works with different object types too (as String.Join has a Join<T>(string IEnumerable<T>) overload):
var arr = new[] { 4, 8, 15, 16, 23, 42 };
var mystring = String.Join(" ", arr);
Use String.Join
var joinedString = string.Join(" ", arr);
