Because the MediaPool.Clear() method is not exposed, you have to iterate over the contents of the Media Pool removing each one. You cannot modify the contents of a collection while iterating over it so you have to make a copy first and iterate over the copy, while modifying the original collection.

Here is the code to do what you want assuming the media is not in use:

import System.Windows.Forms;

import System.Collections;

import Sony.Vegas;

try

{

    var mediaKeys : ArrayList = new ArrayList();



    // Copy the keys of all the media into an array

    var enumMedia : IEnumerator = Vegas.Project.MediaPool.GetEnumerator();

    while (enumMedia.MoveNext()) 

    {

        var media : Media = enumMedia.Current;

        mediaKeys.Add(media.KeyString);

    }



    // Iterate through the array removing media files from the pool

    for (var keyName in mediaKeys)

    {

        Vegas.Project.MediaPool.Remove(keyName);

    }



}

catch (errorMsg)

{

    MessageBox.Show(errorMsg, "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);

}

~jr