derived type

Thrown when an explicit conversion from a base type to an interface or to a derived type fails at runtime.

If you call the derived type's GetHashCode method, the return value is not likely to be suitable for use as a key in a hash table.

Type interceptors, instead, just mock the type of the intercepted object and work on an instance of a derived type.

An inheritance line with an arrow pointing from the derived type to the base type appears between the two shapes on the diagram.

This enables you to reflect on the inherited members of a derived type.

This means that the derived type is exactly the same type as the base class since it has exactly the same interface.

Instead, this method is inherited by a derived column class, which can then be used to reset a column of the derived type.

A derived type can be cast to a primitive type if its primitive ancestor can be cast to the target type.

A virtual method can be implemented by a derived type and can be invoked either statically or dynamically.

It might seem surprising that a conversion from a derived type to one of its base types is widening.

The virtual method cannot be overridden in a derived type.

The type shape of the derived type also displays the name of the base type.

In the opposite direction, the base type does not contain any new members defined by the derived type.

If the derived type overrides a base type member, the base type member is not copied to the derived type's prototype.

Designers of a base class can anticipate the aspects of their base class that are likely to change for a derived type.

The only exception is when the derived type is itself an abstract type.

On the class diagram, drag a line from the shape that represents the derived type to the shape that represents the base type.

On the class diagram, drag a line from the shape representing the derived type to the shape representing the base type.

to enforce that only the derived type, or a more derived type, is passed to the method.

Schema validation warning: The derived type and the base type must have the same content type.

Declare the derived type as a class or structure instead.

A derived type can hide an inherited member by defining a new member with the same signature.

Covariance enables you to use a more derived type than that specified by the generic parameter.

The vitamin used in this study is a plant-derived type called vitamin D2.

To view a derived type, an inheritance relationship must exist between two types.

As a result, any base field that is not used in the derived type is a waste of good memory.

A derived type can override an inherited virtual method.

Conversions from derived type to base type are allowed.

Each derived type may add its own data, which we will want to include when testing for equality.

The problem with Ada 95 is that it only permits a derived type to have one immediate ancestor.

One or more fields of the derived type is used to calculate the return value.

Nevertheless, both the Visual Basic and C# compilers allow you to touch static members of a base type through a derived type name.

The problem here is that at the time when the base type's constructor is executing, the derived type's constructor has not yet executed.

For example, to override a field or property, create an XmlElementAttribute, using the new, derived type.

A derived type declares a method with the same name and with the same number of parameters as one of its base methods;

The derived type that introduces mixed content should be specified as follows

Matching rule for generic derived type