Calling C# code from VB.net code

Question

This is my c# code in some Dll

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Win32;


namespace LP_Misc
{
    public class LP_Registery
    {
        LP_Registery()
        {
            ReadMyTestRegKey();
        }
        public void ReadMyTestRegKey()
        {

            RegistryKey regkey;/* new Microsoft.Win32 Registry Key */

            regkey = Registry.CurrentUser.OpenSubKey(@"Software\PCBMatrix\LPWizard\experimental");


            string[] valnames = regkey.GetValueNames();

            string val0 = (string)regkey.GetValue(valnames[0]);

            Console.Write("--------------------------------The {0} val is {1}", valnames[0], val0);

        }

    }
}

I am trying to call it from some vb code in another dll .

Like this

Imports LP_Misc
.
.
.
Dim T As LP_Registery()

I don't get any errors but it just not enters to the C# code . It just jumps over it and goes over .

any idea ?

Answer 1

You didn't instantiate your object. You need this:

Dim T As New LP_Registery()

However, your constructor is private, so that won't work either. You need this in your object:

public LP_Registery()
{
    ReadMyTestRegKey();
}

Answer 2

Your constructor is not declared as public, so by default in C# it is private:

    LP_Registery()
    {
        ReadMyTestRegKey();
    }

Change it to:

    public LP_Registery()
    {
        ReadMyTestRegKey();
    }

You are also not calling the constructor in your VB.NET code.

T = new LP_Registery()

Answer 3

Without the New keyword, your VB code hasn't executed anything in the C# dll. Make this your last line of VB code:

Dim T As New LP_Registry()

Answer 4

This line in your code:

Dim T As LP_Registery()

...declares T to be an array of type LP_Registery but does not actually create any instance of it. You probably want to change it to this:

Dim T As New LP_Registery()

Answer 5

You may have to add the csproject into the same solution as your vbproject is. Make sure that in your vbproj, you are referencing the csproj by reference.

Answer 6

Dont you need

Dim t as LP_Registery

t = new LP_Registery

?