Question

I’ve created a DLL and referenced it to my project, but I cannot figure out how to actually use it. It appears that to make it work, I have to use some code like

MyClass class = new MyClass;  

But I still can’t get it to work. Here’s my code:

using MyClass;  
namespace NoName  
{  
    public partial class Form1 : Form  
    {  
        public Form1()  
        {  
            InitializeComponent();  
        }  

        private void Form1_Load(object sender, EventArgs e)
        {
            MyClass MyClass = new MyClass();
            Bitmap bmp = new Bitmap(MainImage.Image);
        }
    }
}

Answer 1

Make sure you have referenced the namespace that holds the types you want to use from your class library in the dependent program.

using <Namespace of MyClass>;

public static void Main()
{
   MyClass blah = new MyClass();
}

In most cases the root namespace you are looking for should match the name of your referenced dll. e.g. DLLName.xxx … where “DLLName” would be your root namespace and the anything after the period would signify child folders in a continuing hierarchy.