Convertion between byte array and object

BinaryConverter.cs

using System;
using System.Runtime.InteropServices;

namespace Utility
{
    /*
     * 
        struct Recipe
        {
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 100)] // important to define the string length
            public string name;

            public int id;

            public double weight;
        } 
     * 
     */

    /// <summary>
    /// Class to convert structures to byte arrays and parse byte arrays to objects.
    /// </summary>
    /// <typeparam name="T">Type of the struct to parse.</typeparam>
    /// <example>
    /// BinaryConverter<Recipe> binaryConverter = new BinaryConverter<Recipe>();
    /// Recipe r = new Recipe() { id = 1, name = "Test123", weight = 1.0 };
    /// var bytes = binaryConverter.GetBytes(r);
    /// Recipe r1 = binaryConverter.FromBytes(bytes);
    /// </example>
    public class BinaryConverter<T> where T : new()
    {
        public byte[] GetBytes(T str)
        {
            int size = Marshal.SizeOf(str);
            byte[] arr = new byte[size];

            IntPtr ptr = Marshal.AllocHGlobal(size);
            Marshal.StructureToPtr(str, ptr, true);
            Marshal.Copy(ptr, arr, 0, size);
            Marshal.FreeHGlobal(ptr);
            return arr;
        }

        public T FromBytes(byte[] bytes)
        {
            T str = new T();
            int size = Marshal.SizeOf(str);
            IntPtr ptr = Marshal.AllocHGlobal(size);

            Marshal.Copy(bytes, 0, ptr, size);

            str = (T)Marshal.PtrToStructure(ptr, str.GetType());
            Marshal.FreeHGlobal(ptr);

            return str;
        }
    }
}