get size of a type c# (How to find size of a class in memory c#)

Use System.Runtime.InteropServices.Marshal.SizeOf(Type t) to find the size of a type. See below for an example.

In project properties under build set Allow unsafe code

The code below uses the method Marshal.SizeOf() to find the size of the class Point

using System;

using System.Runtime.InteropServices;

namespace ConsoleApplication3

{

    class Program

    {

        static void Main(string[] args)

        {

            unsafe

            {

                var sizeinBytes = Marshal.SizeOf(typeof(Point));//size in bytes

                Console.WriteLine(sizeinBytes);//16

            }

        }

        [StructLayout(LayoutKind.Sequential)]

        public class Point

        {

            int x;//4 bytes

            int y;//4 bytes

            private int[] i = new int[10];//reference to an array will hold a 32 bit address (for a 32 bit address bus), which is 4 bytes

            AnyClass ac;//reference to a class will hold a 32 bit address (for a 32 bit address bus), which is 4 bytes

        }

        public class AnyClass

        {

        }

    }

}