ParticleSystem.main

public ParticleSystem.MainModule main ;

Description

Access the main particle system settings.

The general settings visible in the ParticleSystem's inspector above all of the other modules are accessible from this special main module.

// Create a particle system
// Set a 5 second start delay for the system, and a 2 second lifetime for each particle
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    void Start()
    {
        ParticleSystem ps = GetComponent<ParticleSystem>();
        var main = ps.main;

        main.startDelay = 5.0f;
        main.startLifetime = 2.0f;
    }
}