Ошибка в коде: somestruct.e must be fully assigned before control is returned to te caller - C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
namespace ConsoleApplication20
{
    class Program
    {
        static void Main(string[] args)
        {
           
        }
    }
   public class Example
    {
        public int x;
        public Example(int a)
        {
            x = a;
        }
    }
   public struct SomeStruct
    {
        public int a;
        public Example e;
        public SomeStruct(int k,int t)
        {
            a = k;
            e.x = t;
        }
 
    }
}