Error: the type name "instance" does not exist

Question

3.00/5 (1 vote)

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.NET4.5

Hi,
I think I am getting ghosted problem in my code. I have a Class named RedCupSkinManager in Class Library projects. I have created a public instant for this class. But, in my Main Windows Application project I could't access the instance.
In my RedCupSkinManager class:

C#

namespace RedCupSkin
{
    public class RedCupSkinManager
    {
      private static RedCupSkinManager instance;
 
      public static RedCupSkinManager Instance
        {
            get { return instance ?? (instance = new RedCupSkinManager()); }
        }
    }
}

In my Main Application:

C#

using RedCupSkin;
using RedCupSkin.Controls;


namespace RedCup
{
    public partial class RedCup : RedCupForm
    {
        private readonly RedCupSkinManager redcupSkinManager; 
        public RedCup()
        {
            InitializeComponent();
            redcupSkinManager = new RedCupSkinManager.Instance;
        }
    }
}

Is there any building problem in vs-2015 or as my class is not static thus while not calling static function throw this class?
Thanks in advance.

What I have tried:

I am developing in VS-2015. I have Build RedCupSkin as its a class library and I have added the reference(RedCupSkin.dll) in my RedCup Windows application.

But, I am getting exception "the type name "instance" does not exist".

Posted 31-May-16 0:55am

Member 10261487

Updated 31-May-16 1:35am

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2 solutions

Solution 2

Try this:

C#

namespace RedCupSkin
{
    public class RedCupSkinManager
    {
        // private 'ctor for Singleton
        private RedCupSkinManager()
        {    
        }

        private static RedCupSkinManager _instance;

        public static RedCupSkinManager Instance
        {
            private set { _instance = value; }
            
            get
            {
                if(_instance == null) _instance = new RedCupSkinManager();
                return _instance;
            }
        }
    }
}

In the Form:

C#

private RedCupSkinManager redcupSkinManager;

private void YourForm_Load(object sender, EventArgs e)
{
    redcupSkinManager = RedCupSkinManager.Instance;
}

I assume your goal here is to make the 'RedCupSkinManager a "singleton," as in the simple example shown here; there are a number of ways to do that from relatively simple to complex. See Jon Skeet's comprehensive review here: [^].

Posted 31-May-16 1:35am

BillWoodruff

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F-ES Sitecore · Accepted Answer · 2016-05-31T01:18:00

Solution 1

You don't need the "new"

C#

redcupSkinManager = RedCupSkinManager.Instance;

Posted 31-May-16 1:18am

F-ES Sitecore

Comments

Member 10261487 31-May-16 7:32am

Thank you. This is working.