IEnumerable to string delimited with commas?
Write an extension method such as
public static String AppendAll(this IEnumerable<String> collection, String seperator){ using (var enumerator = collection.GetEnumerator()) { if (!enumerator.MoveNext()) { return String.Empty; } var builder = new StringBuilder().Append(enumerator.Current); while (enumerator.MoveNext()) { builder.Append(seperator).Append(enumerator.Current); } return builder.ToString(); }}and assuming the result of your previous expression is IEnumerable<String>, call:
var _values = _tbl.AsEnumerable().Select(x => x).AppendAll(String.Empty);