Error cannot declare instance members in a static class

Question

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections.Specialized;
using System.Configuration;

I am receiving this error

cannot declare instance members in a static class

when writing a Static class. Any idea how to solve it keeping the class static if possible? Thanks

namespace XXX.Helpers
{
    public static class Utility
    {
        public static string GetConfiguration(string section, string key)
        {
            NameValueCollection mySection = (NameValueCollection)ConfigurationManager.GetSection(section);

            return mySection[key];
        }
    }
}

Duplicate: cannot declare instance members in a static class in C# — Stuart
– Stuart, Commented Jan 8, 2014 at 7:51

Soner Gönül · Accepted Answer · 2014-01-08 07:48:47Z

6

You can not define non-static members in a static class. It is not legal to declare an instance member in a static class.

From Static Classes and Static Class Members (C# Programming Guide)

The following list provides the main features of a static class:

Contains only static members.

Cannot be instantiated.

Is sealed.

Cannot contain Instance Constructors.

I have to say, I don't see any instance member in your static class by the way :)

answered Jan 8, 2014 at 7:48

Soner Gönül

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Comments

ssilas777 · Accepted Answer · 2014-01-08 07:55:02Z

1

cannot declare instance members in a static class

The reason for this error is because -

Static class should only contains static members

edited Jan 8, 2014 at 7:55

answered Jan 8, 2014 at 7:49

ssilas777

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2 Comments

Eisenhorn Over a year ago

The class doesn't have any members though. Just a static function. Static functions in return CAN have non-static members.

ssilas777 Over a year ago

@Eisenhorn ah..you are right, I just jumped to answer with out cheking the code.

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