Question

I want to call a function from a .net executable from my own code.
I used reflector and saw this:

namespace TheExe.Core
{
    internal static class AssemblyInfo
    internal static class StringExtensionMethods
}

In namespace TheExe.Core is the function I am interested in:

internal static class StringExtensionMethods
{
    // Methods
    public static string Hash(this string original, string password);
    // More methods...
}

Using this code I can see the Hash Method but how do I call it?

Assembly ass = Assembly.LoadFile("TheExe");
Type asmType = ass.GetType("TheExe.Core.StringExtensionMethods");
MethodInfo mi = asmType.GetMethod("Hash", BindingFlags.Public | BindingFlags.Static);
string[] parameters = { "blabla", "MyPassword" };

// This line gives System.Reflection.TargetParameterCountException
// and how to cast the result to string ?
mi.Invoke(null, new Object[] {parameters});

Answer 1

You are passing an array of strings as a single parameter with your current code.

Since string[] can be coerced to object[], you can just pass the parameters array into Invoke.

string result = (string)mi.Invoke(null, parameters);