ByRef or ByVal? [Resolved]

[mendhak]

Last question for today.

static void RunApp(object state) 
        {
            Application.Run((Form)state);
        }

I am currently converting it to VB.NET, I'd like to know whether "state" is being passed ByRef or ByVal. Does C# have the concept of ByRef/ByVal?

[Sgt-Peppa]

I am not quite sure bout that but if I recall correctly,......

if you pass an object it will always be passed by refrence.
But yes you can also specify that using keywords ref (out) or val.

heres an example:

		private void button2_Click(object sender, System.EventArgs e)
		{
			System.Xml.XmlDocument myDoc  = new System.Xml.XmlDocument();
			testFunction(myDoc);
			textBox2.Text = myDoc.SelectSingleNode("//test").InnerText;
			
		}
		private void testFunction(System.Xml.XmlDocument myDoc)
		{
			myDoc.LoadXml("<test>value</test>");
		}

Please do corrcet me if I am wrong!

Stephan

[crptcblade]

Reference types (Forms, other complex objects) will always be ByRef. Value types (primatives, structs) will always be ByVal unless the ref modifier is used.

[mendhak]

OK, so what I understand is that it's the same deal as in VB.NET, except it's taboo to mention it in C#.

[crptcblade]

Yup

Burstable Bandwidth

[Cander]

Wont arrays also be essentially byref as well?

[mendhak]

That's what I assumed too.