public static void TestCaseRef()
{
Testref a = new Testref {
Value = 10
};
Console.WriteLine("Before TestRef, a.Value:{0}", a.Value);
TestRef(a);
System.Diagnostics.Debug.Assert(a != null);
Console.WriteLine("After TestRef, a.Value:{0}", a.Value);
Console.WriteLine("Before TestRefEx, a.Value:{0}", a.Value);
TestRefEx(ref a);
System.Diagnostics.Debug.Assert(a != null);
Console.WriteLine("After TestRefEx, a.Value:{0}", a.Value);
string str_a = "IIIIIIIIIIIII";
Console.WriteLine(str_a);
string str_b = str_a;
//str_b[0] = 'H'; //error, string is const
Console.WriteLine("Before b=a, a.Value:{0}", a.Value);
Testref b = a;
b.Value = 120;
Console.WriteLine("After b=120, a.Value:{0}", a.Value);
b = null;
Console.WriteLine("After b=null, a.Value:{0}", a.Value);
}
public static void TestRefEx(ref Testref a)
{
a.Value = 30;
//a = null; will trigger assert
Testref b = new Testref {
Value = 100
};
a = b;
}
public static void TestRef(Testref a)
{
a.Value = 20;
a = null; // will not trigger assert
}