Share image with hastag

I never used FB.API, I just simply use android intent for sharing the images, is there anyway to add the hashtag text into that, so far I used this script

 using UnityEngine;
 using System.Collections;
  
  
 public class ShareApp : $$anonymous$$onoBehaviour {
   
  string subject = "WORD-O-$$anonymous$$AZE";
  string body = "PLAY THIS AWESO$$anonymous$$E GA$$anonymous$$$$anonymous$$ GET IT ON THE PLAYSTORE AT LIN$$anonymous$$";
  
  public void shareText(){
  //execute the below lines if being run on a Android device
  #if UNITY_ANDROID
   //Refernece of AndroidJavaClass class for intent
   AndroidJavaClass intentClass = new AndroidJavaClass ("android.content.Intent");
   //Refernece of AndroidJavaObject class for intent
   AndroidJavaObject intentObject = new AndroidJavaObject ("android.content.Intent");
   //call setAction method of the Intent object created
   intentObject.Call<AndroidJavaObject>("setAction", intentClass.GetStatic<string>("ACTION_SEND"));
   //set the type of sharing that is happening
   intentObject.Call<AndroidJavaObject>("setType", "text/plain");
   //add data to be passed to the other activity i.e., the data to be sent
   intentObject.Call<AndroidJavaObject>("putExtra", intentClass.GetStatic<string>("EXTRA_SUBJECT"), subject);
   intentObject.Call<AndroidJavaObject>("putExtra", intentClass.GetStatic<string>("EXTRA_TEXT"), body);
   //get the current activity
   AndroidJavaClass unity = new AndroidJavaClass ("com.unity3d.player.UnityPlayer");
   AndroidJavaObject currentActivity = unity.GetStatic<AndroidJavaObject>("currentActivity");
   //start the activity by sending the intent data
   currentActivity.Call ("startActivity", intentObject);
  #endif
    
  }
   
 }

This script is working with all application except Facebook when I press whatsapp, it's add both string value but in facebook it's not working perfectly how can I add this into facebook. This is the exact thing I want.