SeedRandom to deal with seed value of UnityEngine.Random

SeedRandom.cs

using System;

public class SeedRandom
{
  private UnityEngine.Random.State _randomState;
  public static int DefaultSeed()
  {
    return (int)System.DateTime.Now.Ticks;
  }

  public SeedRandom() : this(SeedRandom.DefaultSeed()) { }

  public SeedRandom(int seed)
  {
    var originalState = UnityEngine.Random.state;
    UnityEngine.Random.InitState(seed);
    _randomState = UnityEngine.Random.state;
    UnityEngine.Random.state = originalState;
  }

  private T WithRandom<T>(Func<T> f)
  {
    var originalState = UnityEngine.Random.state;
    UnityEngine.Random.state = _randomState;

    var result = f();

    _randomState = UnityEngine.Random.state;
    UnityEngine.Random.state = originalState;
    return result;
  }

  public int Range(int minInclusive, int maxExclusive)
  {
    return WithRandom(() => UnityEngine.Random.Range(minInclusive, maxExclusive));
  }

  public float Range(float minInclusive, float maxInclusive)
  {
    return WithRandom(() => UnityEngine.Random.Range(minInclusive, maxInclusive));
  }

  public float Value()
  {
    return WithRandom(() => UnityEngine.Random.value);
  }
}