getting done things

public static string GetFilterExpression(int filterId)

{

var db = new UserQuery();

var filter = db.Filters.Single(f => f.Id == filterId);

var filterExpressions = filter.FilterExpressions;

var expressions = new List();

foreach(FilterExpression expr in filterExpressions)

{

expressions.Add(string.Format(expr.Operator.Operation, expr.ColumnName, expr.Value));

}

string logicalOperator = (filter.MatchAll) ? " AND " : " OR ";

return String.Join(logicalOperator, expressions.ToArray());

}