Checks if material's shader has a property of a given name.

	// Attach this to a gameObject that has a renderer.
	if(renderer.material.HasProperty("_Color"))
		renderer.material.SetColor("_Color",Color.red);

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        if (renderer.material.HasProperty("_Color"))
            renderer.material.SetColor("_Color", Color.red);
        
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		if renderer.material.HasProperty('_Color'):
			renderer.material.SetColor('_Color', Color.red)