public void DropColumns(string tableName, IEnumerable <string> columns)
{
using (var transaction = _sqLiteMigrationHelper.BeginTransaction())
{
var originalColumns = _sqLiteMigrationHelper.GetColumns(tableName);
var originalIndexes = _sqLiteMigrationHelper.GetIndexes(tableName);
var newColumns = originalColumns.Where(c => !columns.Contains(c.Key)).Select(c => c.Value).ToList();
var newIndexes = originalIndexes.Where(c => !columns.Contains(c.Column));
CreateTable(tableName, newColumns, newIndexes);
transaction.Commit();
}
}