[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] ICloneable interface  ICollection collection interface  IComparable interface  IComparer collection interface  IConvertible interface  IDE (Integrated Development Environment)  2nd  [See also VS.NET] identifiers      classes      enumerations      interfaces      labels      methods      naming conventions for  2nd      objects      structs      symbolic constants      variables  IDictionary collection interface  IDictionaryEnumerator collection interface  IDisposable interface  IEnumerable collection interface  2nd      GetEnumerator() method  2nd  IEnumerator collection interface  2nd      property and methods for      stepping through methods in debugger  if ... else statement  if statement  2nd  IL (Intermediate Language)  IList collection interface  implementer of an interface  implicit keyword  2nd  in operator  increment operator (++)  2nd  incrementing variables  index operator ([])     for arrays  2nd      for strings  indexers      assigning to      declaring      get() method for      indexing on types other than integer      set() method for  2nd  IndexOf() method     System.Array class      System.String class  IndexOf() method, System.String class  inequality operator      overloading  inheritance  2nd  [See also polymorphism]     implementing      not supported for structs  initializers  2nd  Insert() method     ArrayList class      StringBuilder class      System.String class  instance member variables  2nd  instance methods  2nd  int type  2nd  3rd  integer division  integer types  Integrated Development Environment  [See IDE] IntelliSense technology  2nd  3rd  interface keyword  2nd  interfaces  [See also abstract classes; collection interfaces]2nd      abstract classes compared to      casting to          reasons for          with as operator          with is operator  2nd      client class for      combining      defining      determining if object implements      explicit implementation of      extending      implementing      methods defined in  2nd      multiple interfaces, implementing  2nd      overriding      properties defined by  Intermediate Language (IL)  internal access modifier  2nd  intrinsic types  2nd  is operator  2nd  3rd  4th  is-a relationship  2nd  3rd  [See also inheritance] IsFixedSize property, System.Array class  IsMatch() method, Regex class  Item() method, ArrayList class  iteration statements  [See looping]