You can create a query to retrieve a list of banned users in both open and group channels. Only users registered as channel operators may use the following code.
SbBannedUserListQueryParams queryParams = new SbBannedUserListQueryParams();
SbBannedUserListQuery query = channel.CreateBannedUserListQuery(queryParams);
query.LoadNextPage((inUsers, inError) =>
{
if (inError != null)
{
return; // Handle error.
}
});