Benchmark.cs

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            BenchmarkRunner.Run<Test>();
        }
    }

    public class Test
    {
        public int A { get; set; }
        public int B { get; set; }
        public int C { get; set; }

        [Benchmark(Baseline = true)]
        public void AddHalfRange()
        {
            var a = A;
            var b = B;
            var c = C;

            c += a + (b - a) / 2;

            C = c;
        }

        [Benchmark]
        public void AddHalf()
        {
            var a = A;
            var b = B;
            var c = C;

            c += (int)(((uint)b + (uint)a) / 2);

            C = c;
        }
    }
}