.net - C# cannot convert method to non delegate type

Question

I have a class called Pin.

public class Pin
{
    private string title;

    public Pin() { }

    public setTitle(string title) {
        this.title = title;
    }
    public String getTitle()
    {
        return title;
    }
}

From another class I add Pins objects in a List<Pin> pins and from another I want to iterate the List pins and get the elements. So I have this code.

foreach (Pin obj in ClassListPin.pins)
{
     string t = obj.getTitle;
}

With this code I cannot retrieve the title. Why?

(Note: ClassListPin is just a static class which contains some elements and one of these, is the List<Pin> pins)

question from:https://stackoverflow.com/questions/14877355/c-sharp-cannot-convert-method-to-non-delegate-type

Answer 1

You need to add parentheses after a method call, else the compiler will think you're talking about the method itself (a delegate type), whereas you're actually talking about the return value of that method.

string t = obj.getTitle();

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Extra Non-Essential Information

Also, have a look at properties. That way you could use title as if it were a variable, while, internally, it works like a function. That way you don't have to write the functions getTitle() and setTitle(string value), but you could do it like this:

public string Title // Note: public fields, methods and properties use PascalCasing
{
    get // This replaces your getTitle method
    {
        return _title; // Where _title is a field somewhere
    }
    set // And this replaces your setTitle method
    {
        _title = value; // value behaves like a method parameter
    }
}

Or you could use auto-implemented properties, which would use this by default:

public string Title { get; set; }

And you wouldn't have to create your own backing field (_title), the compiler would create it itself.

Also, you can change access levels for property accessors (getters and setters):

public string Title { get; private set; }

You use properties as if they were fields, i.e.:

this.Title = "Example";
string local = this.Title;