C#

String someString = "";
DoSomething(ref someString);

// Now someString has new value



Function:
private void DoSomething(ref String str)
{
str = "Was Empty";
}

humayunlalzad wrote:

Why is the ref keyword added to String in this example. Isn't string a reference type already? I thought ref is only to make value types behave like reference types.

string str="aha";
log(str);
func1(str);
log(str);
func2(ref str);
log(str);

private void func1(String str) {str = "Changed"; log("1 "+str);}
private void func2(ref String str) {str = "Changed";log("2 "+str); }
private void log(string s) {Console.WriteLine(s);}

bool empty = string.IsNullOrEmpty("");

bool empty = String.IsNullOrEmpty("");

Scott Dorman wrote:

I prefer using string when I am typing a variable and String when I am acessing static members of the class.