CODE EXAMPLE FOR CSHARP

unity time scale

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    void Update() {
        if (Input.GetButtonDown("Fire1")) {
            if (Time.timeScale == 1.0F)
                Time.timeScale = 0.7F;
            else
                Time.timeScale = 1.0F;
            Time.fixedDeltaTime = 0.02F * Time.timeScale;
        }
    }
}