How to use VB.net Class in C# project?

Question

I would like to use the below VB.Net class in my C# Project. Is there any way to do it?. Thanks in advance.

 Public Class XMLItemList
        Private sb As System.Text.StringBuilder

        Public Sub New()
            sb = New System.Text.StringBuilder
            sb.Append("<items>" & vbCrLf)
        End Sub

        Public Sub AddItem(ByVal Item As String)
            sb.AppendFormat("<item id={0}{1}{2}></item>{3}", Chr(34), Item, Chr(34), vbCrLf)
        End Sub

        Public Overrides Function ToString() As String
            sb.Append("</items>" & vbCrLf)
            Return sb.ToString
        End Function     
    End Class

Answer 1

You need to create VB.NET DLL assembly (using Library project template from Visual Studio) and then you can add the reference of DLL assembly to your C# project. Be sure that the only public types (classes) are visible outside the assembly.

Answer 2

Yes. Because both VB.NET and C# compile into IL (intermediate language), you can simply create a library (a DLL file) in VB.NET, and then use that library in C#.

Answer 3

It's better to translate it into C#, and to fix the broken ToString() implementation:

  using System.Xml;

  public class XMLItemList
  {
    XmlElement el;
    XmlDocument doc;

    public XMLItemList()
    {
      doc = new XmlDocument();
      el = doc.CreateElement("items");
    }

    public void AddItem(string item)
    {
      var itemXml = doc.CreateElement("item");
      var attr = doc.CreateAttribute("id");
      attr.Value = item;
      itemXml.Attributes.Append(attr);

      el.AppendChild(itemXml);

    }

    public override string ToString()
    {
      return el.OuterXml;
    }
  }

Answer 4

将类转换为C＃或将类保存在类库中，并在C＃项目中引用它。