Coding is used to describe the out and ref parameters.

 

Void main (string [] ARGs)
{
// Test the transfer of out and ref Parameters
Int A; int B; int c = 2; // (1) the out parameter can be not initialized before calling, but the ref parameter must be initialized.
Testoutref (out a, out B, ref C); // (2) when calling a method, you must add out or ref before the Parameter
Console. writeline (string. Concat (a + "," + B + "," + C ));
Console. Read ();
}

// The out parameter must be used inside the method, and the ref parameter can not be used (the usage of the out parameter means that the method can have multiple return values)
Static void testoutref (Out int A, out int B, ref int C)
{
A = 1;
B = 2; // A, B must be used inside the Method
C = 3; // C can be left empty in the Method
}

ProgramRunning result: 1, 2, 3

Static