Back to notes -- Keyboard shortcut: 'u'  previous -- Keyboard shortcut: 'p'  next -- Keyboard shortcut: 'n'  Slide program -- Keyboard shortcut: 't'    Two generic classes C and D - with compiler errors.Lecture 11 - slide 11 : 21
Program 2
/* Example from Hansen and Sestoft: C# Precisely */

class C<T>{
  // Compiler Error message:
  // Cannot convert null to type parameter 'T' because it could 
  // be a value type. Consider using 'default(T)' instead.
  T f = null;

class D<U>{
  // Compiler Error message:
  // The type 'U' must be a non-nullable value type in order to use 
  // it as parameter 'T' in the generic type or method 
  // 'System.Nullable<T>'
  U? f;