// InvokeDeleteAssets
object[] list = new object[5];
list[0] = "edl/cmf//localhost/C:/default/alpha/Clip";
list[1] = "edl/cmf//localhost/C:/default/alpha/beta/Clip1";
list[2] = "edl/cmf//localhost/C:/default/alpha/beta/gamma/Clip2";
list[3] = "edl/cmf//localhost/C:/default/alpha/InvalidClipName1";
list[4] = "edl/cmf//localhost/C:/default/alpha/beta/InvalidClipName2";

// delete a list of assets
int asyncCookie = mediaMgr.InvokeDeleteAssets(list);

// wait until operation is complete
int percentComplete = 0;
string currentUri;
int errorCount;

do
{
    // get status of deletes
    mediaMgr.GetAsyncStatus(asyncCookie, out percentComplete, out currentUri, out errorCount);

    Console.WriteLine("percent complete: {0}  current URI: {1}  error count: {2}", percentComplete, currentUri, errorCount);
    Thread.Sleep(200);                                
}
while (percentComplete < 100);

// print out last error
string lastUriError;
int lastError = mediaMgr.GetLastAsyncError(asyncCookie, out lastUriError);
Console.WriteLine("Last error: 0x{0:x} Last error URI: {1}", lastError, lastUriError);

// close the async operation
object errorList;
object errorUriList;                            
mediaMgr.CloseAsyncOp(asyncCookie, out errorList, out errorUriList);

object[] errorListArray = errorList as object[];
object[] errorUriListArray = errorUriList as object[];

// print out all errors
for (int i=0; i < errorListArray.Length; i++)
{
    Console.WriteLine("Error: 0x{0:x} Error URI: {1}", errorListArray[i], errorUriListArray[i]);
}