Question

How to create sealed class to prevents other classes from inheriting from it in C#

Answer 1

using System;

sealed class SealedClass {
    public int x;
    public int y;
}

// class Program : SealedClass //  error CS0509: `Program': cannot derive from sealed type `SealedClass'
class Program 
{
    static void Main()
    {
        var sc = new SealedClass();
        
        sc.x = 984;
        sc.y = 142;
        
        Console.WriteLine($"x = {sc.x}, y = {sc.y}");
    }
}



/*
run

x = 984, y = 142

*/

 

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