local method no lamdba decompiled

DecompiledProgram.cs

using System;
using System.Runtime.CompilerServices;

namespace LocalFuncCreatesClass
{
    internal class Program
    {
        private static Func<int> GetNextThing
        {
            get;
            set;
        }

        public Program()
        {
        }

        [CompilerGenerated]
        internal static int <Blah>g__next5_0(ref Program.<>c__DisplayClass5_0 variable)
        {
            int num = variable.current + 1;
            variable.current = num;
            return num;
        }

        private static void Blah()
        {
            Program.<>c__DisplayClass5_0 variable = new Program.<>c__DisplayClass5_0();
            Console.WriteLine(Program.<Blah>g__next5_0(ref variable));
        }

        private static void Main(string[] args)
        {
            Program.Blah();
        }

        [CompilerGenerated]
        private struct <>c__DisplayClass5_0
        {
            public int current;
        }
    }
}

Program.cs

using System;

namespace LocalFuncCreatesClass
{
    class Program
    {
        static Func<int> GetNextThing { get; set; }
        static void Main(string[] args)
        {/*
            SeparateFunction();
            Console.WriteLine(GetNextThing());
            Console.WriteLine(GetNextThing());
            Console.WriteLine(GetNextThing());

            SeparateFunction();
            Console.WriteLine(GetNextThing());
            Console.WriteLine(GetNextThing());
            Console.WriteLine(GetNextThing());*/

            Blah();
        }
        /*
        static void SeparateFunction()
        {
            var current = 2;
            int next() { return ++current; };
            GetNextThing = next;
            Console.WriteLine(next());
        }*/

        static void Blah()
        {
            var current = 2;
            int next() => ++current;
            Console.WriteLine(next());
        }
    }
}