由于其保护级别，成员变量不可访问

Question

I am trying to access a variable in my implementation and it states that "its inaccessible due to its protection level"

namespace mytest
{
    public class IDatabaseSettings
    {
        string connection { get; set; }
    }
}

namespace mytest
{
    public class DatabaseSettings : IDatabaseSettings
    {
        public string connection{ get; set; }
    }
}

IDatabaseSettings settings = new DatabaseSettings();
settings.connection <--- is inaccessible due to its protection level

Any suggestions on why this might be happening ?

Answer 1

While you have a public class, the property you created is private. The default when you don't specify an access modifier on a class is private. Interfaces do not allow access modifiers as everything is assumed public (otherwise the interface would not be useful).

Use this instead on your DatabaseSettings class (the interface is fine):

public string connection { get; set; }

Also, your interface is defined as a class. Define it as an interface instead:

public interface IDatabaseSettings
{
    ...
}