Dictionary KVPs

string input = "abc:1|bbbb:2|xyz:45|p:120";
string pattern = @"(?<Key>[^:]+)(?:\:)(?<Value>[^|]+)(?:\|?)";

Dictionary<string, string> KVPs
    = ( from Match m in Regex.Matches( input, pattern )
      select new
      {
          key = m.Groups["Key"].Value,
          value = m.Groups["Value"].Value
       }
       ).ToDictionary( p => p.key, p => p.value );

foreach ( KeyValuePair<string, string> kvp in KVPs )
    Console.WriteLine( "{0,6} : {1,3}", kvp.Key, kvp.Value );