C# - How to call a method from static void main

Question

I have some code in static void main, although I would like it to call the startremdup method (as it calls the RemoveDuplicate, with the appropriate parameters) from static void main, I have tried startremdup();

private void RemoveDuplicate(string sourceFilePath, string destinationFilePath)
{
    var readLines = File.ReadAllLines(sourceFilePath, Encoding.Default);

    File.WriteAllLines(destinationFilePath, readLines.Distinct().ToArray(), Encoding.Default);
}


private void startremdup(object sender, EventArgs e)
{
    RemoveDuplicate("C:\test.txt", "C:\test2.txt");
}

Answer 1

startremdup is an instance method. That means you need to call it on an instance of whatever class it's contained in. For example:

Foo foo = new Foo();
foo.startremdup(null, EventArgs.Empty);

Personally it looks like it should be a static method to start with - and preferably one with a more sensible name - but that's why it's not working at the time.

If I were you, I'd actually put down your current task and pick up a good introductory C# book - learn the difference between static and instance members, etc.

Answer 2

Make both startremdup() and RemoveDuplicate() static.

private static void RemoveDuplicate(string sourceFilePath, string destinationFilePath)
{
    var readLines = File.ReadAllLines(sourceFilePath, Encoding.Default);

    File.WriteAllLines(destinationFilePath, readLines.Distinct().ToArray(), Encoding.Default);
}


private static void startremdup(object sender, EventArgs e)
{
    RemoveDuplicate("C:\test.txt", "C:\test2.txt");
}

Answer 3

Make your methods static as well.