Anyone can help me? Its happening for all 3 structs(struct0 , struct1, and struct2)

using System;
using System.Runtime. InteropServices ;

internal sealed class Class0
{
internal static int int_0; // data size: 4 bytes
internal static int int_1; // data size: 4 bytes
internal static int int_2; // data size: 4 bytes
internal static int int_3; // data size: 4 bytes...