The Directive and Assembly Missing Error in C# DLL creation

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Hello,

I am Creating a small project which is created in C#. I am having a DLL file by the use of DLL file, I have to call the functions and methods and Make that project as a new DLL. I done this But the problem is The C# code is converted to net module it shows two errors. I am not clear about that kindly help me over it.

Code:

public int Add(int a, int b)
{
return a + b;
}

Errors:

Basic.cs(7,7): error CS0246: The type or namespace name 'Add' could not be
found (*are you missing a using directive or an assembly reference?*)

Basic.cs(22,9): error CS0246: The type or namespace name 'Add' could not
be found (are you missing a using directive or an assembly reference?)

Tried Methods:

1. I will add the reference via Project-> Add Reference.

2. The using Reference also used.

Posted 30-Apr-15 0:29am

ahamednafeel

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OriginalGriff · Answer 1 · 2015-04-30T00:42:00

Solution 1

Start differently: Use VS to add a new project to your solution, and tell it to create a class library. It will then create a project with a default "class1" which you can modify to fit your needs as it will contain a valid basic file framework. When you build it, it will produce a .NET DLL assembly for you that should work fine.

You can then add a reference to that project (or the built DLL) to your otehr project and access the methods either directly via their full name: MyAssemblyNamespace.MyClass.Add or by adding the appropriate using statement to your code:

C#

using MyAssemblyNamespace;
...
    MyClass mc = new MyClass();
    mc.Add(...);

Posted 30-Apr-15 0:42am

OriginalGriff

Comments

ahamednafeel 19-May-15 23:49pm

Boss am not creating a normal DLL. Am creating a Native DLL.

OriginalGriff 20-May-15 3:13am

No, you aren't! :laugh:
C# does not create Native DLLs - it creates .NET DLL Assembly files.
To generate a native DLL, you pretty much have to use C++, not C#.

It is in theory possible to create a "native-a-like" DLL which can be called from Native apps, but it's not trivial at all:
https://sites.google.com/site/robertgiesecke/Home/uploads/unmanagedexports

ahamednafeel 20-May-15 21:59pm

Yes, You are right.. Am creating a Native DLL by using CPP with the use of C# net module. I have an Issue. Is there any possibility to Merge a DLL file into Another??

OriginalGriff 21-May-15 5:18am

I don't know of anything that automatically does that, and it wouldn't work anyway if your two DLL files are Native and .NET - the latter are not "real" DLLs, they are intermediate code assemblies and have totally different startup needs.