Script Needs To Derive From MonoBehaviour

Questions & Answers
1

I copied and pasted a script into my script and edited it to be my own, and I got this error while trying to drag it onto a game object:

The Script Needs to Derive from MonoBehavior!

I would simply like to know how to fix it. I did a little research on it, and found everything out about it other than to fix it xD. Here’s my code:

using System;
using System.IO;
using System.Text;

public class ServerCreate : MonoBehaviour
{
    void Start()
    {
        string path = @"c:\bgriley\Desktop\MyTest.txt";

        try
        {

            // Delete the file if it exists. 
            if (File.Exists(path))
            {
                // Note that no lock is put on the 
                // file and the possibility exists 
                // that another process could do 
                // something with it between 
                // the calls to Exists and Delete.
                File.Delete(path);
            }

            // Create the file. 
            using (FileStream fs = File.Create(path))
            {
                Byte[] info = new UTF8Encoding(true).GetBytes("This is some text in the file.");
                // Add some information to the file.
                fs.Write(info, 0, info.Length);
            }

            // Open the stream and read it back. 
            using (StreamReader sr = File.OpenText(path))
            {
                string s = "";
                while ((s = sr.ReadLine()) != null)
                {
                    Console.WriteLine(s);
                }
            }
        }

        catch (Exception Ex)
        {
            Console.WriteLine(Ex.ToString());
        }
    }
}

Thanks

3

You might also get this error if the name of the script is different then what’s in your asset folder.

2

Script can only be set on gameobject if it extends MonoBehaviour. So:

public class MyClass : MonoBehaviour

Also, you Main method does not really fit into unity script. Convert it to

void Start()

or something.