Pass texture2d array as function parameter in Enumerator

i have this enumerator that loads a folders images asynchronously and i would like to be able ta pass the array as a parameter, but when i try to do it even though i get no error the array (source) does not get populated.

Code (CSharp):

1.  
2. private IEnumerator GetTextureFromPath(string _dirname) // here it would be ,Texture2D _source
3.     {
4.         var fileNames = Directory.GetFiles(Application.persistentDataPath + "/" + _dirname, "*.jpg");
5.         source = new Texture2D[fileNames.Length]; // this source array would be referenced in the params.
6.         Array.Sort(fileNames, (s1, s2) => Path.GetFileName(s1).CompareTo(Path.GetFileName(s2)));
7.         int index = 0;
8.         foreach (var fileName in fileNames)
9.         {
10.             UnityWebRequest webRequest = UnityWebRequestTexture.GetTexture("file://" + fileName);
11.             while (!webRequest.isDone)
12.             {
13.                 yield return webRequest.SendWebRequest();
14.             }
15.             if (webRequest.isNetworkError || webRequest.isHttpError)
16.             {
17.                 Debug.Log(webRequest.error);
18.             }
19.             else
20.             {
21.                 source[index] =  LoadTextureFromPath(fileName);
22.                 source[index].name = fileName;
23.                 index++;
24.                 Debug.Log("Ends server comm");
25.                 Debug.Log("FileNames :" + " " + fileName);
26.             }
27.         }
28.     }

any ideas please?

what this function does is get all files from a directory and populate a texture2d array with each image. now this call happens on game load so since i have 4 more arrays (source1 , source2 etc) i would like the array to be in the parameters so i can tell the script as to which array to populate from that directory

 

ok it seems its due to it being asynchronous i think because i made the function into a void one with the texture as a ref and it worked, so i will change the title accordingly!

Code (CSharp):

1.  public void LoadTextureArray(string _dirname, ref Texture2D[] arr)
2.     {
3.         var fileNames = Directory.GetFiles(Application.persistentDataPath + "/" + _dirname + "/", "*.jpg");
4.         arr = new Texture2D[fileNames.Length];
5.  
6.         Array.Sort(fileNames, (s1, s2) => Path.GetFileName(s1).CompareTo(Path.GetFileName(s2)));
7.  
8.         //Debug.Log(string.Join("\n", fileNames));
9.  
10.         int index = 0;
11.         foreach (var fileName in fileNames)
12.         {
13.             arr[index] = LoadTextureFromPath(fileName);
14.             arr[index].name = fileName;
15.             index++;
16.         }
17.     }