[c#] Options for initializing a string array

What options do I have when initializing string[] object?

string[] str = new string[]{"1","2"};
string[] str = new string[4];

Basic:

string[] myString = new string[]{"string1", "string2"};

or

string[] myString = new string[4];
myString[0] = "string1"; // etc.

Advanced: From a List

list<string> = new list<string>(); 
//... read this in from somewhere
string[] myString = list.ToArray();

From StringCollection

StringCollection sc = new StringCollection();
/// read in from file or something
string[] myString = sc.ToArray();

MSDN has the skinny on this.