Question

I need to know how to use the command line to compile and run C# from the command line but I cannot figure out how to correctly use a DLL I made. The DLL is a simple maths file the code inside is:

using System;

namespace SimpleMaths
{
public class Operations
{

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

    public static int substract(int a, int b)
    {
        return a - b;
    }

    public static int multiply(int a, int b)
    {
        return a * b;
    }
}
}

I successfully compiled it as a DLL file. Now I have a class called sum.cs, and in there I want to access the methods of this library, I did have a lot of messy code in there which was nowhere near right so I deleted it, here is what I have now:

using System;
public class sum
{
public static void Main()
{

//How can I access the methods in the SimpleMaths library???
}
}

Usually in Visual Studio I would add the DLL as a reference and then create objects which would give me access to the methods. I have searched on-line and the examples I have found are confusing me. Am I right in saying that you cannot create objects using the command line?

Any advice is appreciated.

Answer 1

You need to use /reference in the command line.

csc /reference:library1.dll /reference:library2.dll csfile.cs

Also make sure to include the namespace in your .cs file.