Property or indexer cannot be assigned to "--" it is read only

Question

So I'm trying to pass a local string to another form in a c# project. This is my code:

Form 1:

... Main frm = new Main(); frm.Passvalue = usrTxt.Text; frm.ShowDialog(); 

Form 2

... public string Username; public string Passvalue {     get { return Username; } } 

I'm getting the error:

Property or indexer "Main.Passvalue" cannot be assigned to "--" it is read only

I never declared anything as ReadOnly, does anyone know what the problem here is?

Answer 1

It has no setter, which makes it a readonly property, change it to:

public string Passvalue {     get { return Username; }     set { Username = value; } } 

Incidentally, this seems a little redundant, as you're publicly exposing Username anyway. It's generally considered good practice to make class fields private.