[ComVisible(true)]
    public class DotNetClass
    {
        /// <summary>
        /// Der Int Wert der Klasse
        /// </summary>
        private int m_ValueInt = 0;

        /// <summary>
        /// Der String der Klasse
        /// </summary>
        private readonly string m_ValueString = String.Empty;

        /// <summary>
        /// Das utilitiy Objekt
        /// </summary>
        private Utility m_Util = new Utility();

       
        /// <summary>
        /// Standardkonstruktor
        /// </summary>
        public DotNetClass()
        {
            m_ValueString = "Hallo";
            m_ValueInt = 7;
            m_Util = new Utility();

        }
...

using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

// General Information about an assembly is controlled through the following
// set of attributes. Change these attribute values to modify the information
// associated with an assembly.
[assembly: AssemblyTitle("DotNetDLL")]
[assembly: AssemblyDescription("")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("NWL Lasertechnologie ")]
[assembly: AssemblyProduct("DotNetDLL")]
[assembly: AssemblyCopyright("Copyright © NWL Lasertechnologie 2008")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]

// Setting ComVisible to false makes the types in this assembly not visible
// to COM components. If you need to access a type in this assembly from
// COM, set the ComVisible attribute to true on that type.
[assembly: ComVisible(true)]

// The following GUID is for the ID of the typelib if this project is exposed to COM
[assembly: Guid("fc0e9806-4758-482d-b677-d11598f1cd3c")]

// Version information for an assembly consists of the following four values:
//
//      Major Version
//      Minor Version
//      Build Number
//      Revision
//
// You can specify all the values or you can default the Revision and Build Numbers
// by using the '*' as shown below:
[assembly: AssemblyVersion("1.0.0.0")]
[assembly: AssemblyFileVersion("1.0.0.0")]