IGrouping<TKey, TElement>.Key Property

Property Value

Type: TKey
The key of the IGrouping<TKey, TElement>.

      ' Get a sequence of IGrouping objects.
      Dim memberQuery As  _
      IEnumerable(Of IGrouping(Of System.Reflection.MemberTypes, System.Reflection.MemberInfo)) = _
          Type.GetType("String").GetMembers(). _
          GroupBy(Function(member) member.MemberType)

      ' Output the key of each IGrouping object and the count of values.
      For Each group As  _
      IGrouping(Of System.Reflection.MemberTypes, System.Reflection.MemberInfo) In memberQuery
         outputBlock.Text &= String.Format("(Key) {0} (Member count) {1}", _
                                           group.Key, group.Count()) & vbCrLf
      Next

      ' The output is similar to:
      ' (Key) Method (Member count) 113
      ' (Key) Constructor (Member count) 8
      ' (Key) Property (Member count) 2
      ' (Key) Field (Member count) 1

      // Get a sequence of IGrouping objects.
      IEnumerable<IGrouping<System.Reflection.MemberTypes, System.Reflection.MemberInfo>> memberQuery =
          typeof(String).GetMembers().
          GroupBy(member => member.MemberType);

      // Output the key of each IGrouping object and the count of values.
      foreach (IGrouping<System.Reflection.MemberTypes, System.Reflection.MemberInfo> group in memberQuery)
         outputBlock.Text += String.Format("(Key) {0} (Member count) {1}", group.Key, group.Count()) + "\n";

      // The output is similar to:
      // (Key) Method (Member count) 113
      // (Key) Constructor (Member count) 8
      // (Key) Property (Member count) 2
      // (Key) Field (Member count) 1