cant seem to get rid of error c# console app

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I get a red wiggly line under 'string' in the Import section (marked with a strikethrough in my code below) with the error "Expected class, delegate, enum, interface, or struct"

anyone know where im going wrong

namespace MEFProgram
{
    [Import (typeof(IMessage))]
    public string GetMessage {get;set;}


    class Program
    {
        static void Main(string[] args)
        {
            Program obj = new Program();
            obj.Compose();
        }

        void Compose()
        {
            var catalog = new TypeCatalog();
            var container = new CompositionContainer();
            container.ComposeParts(catalog);
            Console.WriteLine(GetMessage);
            Console.ReadLine();
        }
    }
}

class plugIN
{
    [Export(typeof(IMessage))]
    string GiveMessage
    {
        get
        {
            return "Message Inserted by MEF";
        }
    }
}

Posted 30-Nov-11 0:08am

webpeon80

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6 solutions

Solution 1

Should the attribute not go above the class ? Just a guess..

C#

namespace MEFProgram
{
    public string GetMessage {get;set;}
 

    [Import (typeof(IMessage))]
    class Program
    {

Posted 30-Nov-11 0:12am

alexis.coles

Solution 2

This is often caused by an extra a closing paranthesis.
Refer to the below answer for more information.
Expected class,delegate,enum, interface,or struct[^]

Posted 30-Nov-11 0:41am

Nikil S

Solution 4

"Expected class, delegate, enum, interface, or struct"

But you have a simple method!

Posted 30-Nov-11 4:25am

Richard MacCutchan

Solution 5

sorted... dropped the string line inside the program class and it cleared up, final code incase anyone runs into the same problem

namespace MEFProgram
{
    class Program
    {
        [Import()]
        string GetMessage { get; set; }

        static void Main(string[] args)
        {
            Program obj = new Program();
            obj.Compose();
        }

        void Compose()
        {
            AssemblyCatalog catalog = new AssemblyCatalog(Assembly.GetExecutingAssembly());
            CompositionContainer container = new CompositionContainer(catalog);
            container.ComposeParts(this);
            Console.WriteLine(GetMessage);
            Console.ReadLine();
        }
    }
}

Posted 30-Nov-11 11:05am

webpeon80

Solution 6

The property GetMessage is outside the class.At the namespace level there can be class,enum,interface or struct.

Properties should be defined at class level

Posted 30-Nov-11 17:42pm

moneymakermaster

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sucram · Accepted Answer · 2011-11-30T03:53:00

Solution 3

C#

public string GetMessage {get;set;}

Is not within a class you can not have a getter ans setter in the namespace.

Posted 30-Nov-11 3:53am

sucram

Comments

webpeon80 30-Nov-11 15:44pm

so where would I place that code if I needed it to be an Import using MEF