Could not load file or assembly - Access is denied. C#

[ShervanN]

Hello,

I'd like to open a file in drive C: but I have an error:
Could you please help me?

System.IO.FileLoadException
  HResult=0x80070005
  Message=Could not load file or assembly 'C:\addins'. Access is denied.
  Source=<Cannot evaluate the exception source>
  StackTrace:
<Cannot evaluate the exception stack trace>

global using System.Text;
using System.Reflection;

class Program
{
    const string CalculatorTypeName = "CalculatorLib.Calculator";
    static void Main(string[] args)
    {
        const string addinPath = @"C:/addins";

        object calc = GetCalculator(addinPath);
        object? result = calc.GetType();
        Console.WriteLine(result);

        Console.ReadLine();
    }
    static object? GetCalculator(string addinPath)
    {
        Assembly assembly = Assembly.LoadFile(addinPath);
        return assembly.CreateInstance(CalculatorTypeName);
    }

}

[christiannagel]

Did you create the c:\addins directory and added the library to this directory? If you use a different directory, you need to change the value of the variable addinPath.