C# Language Specification

The object type

The object class type is the ultimate base class of all other types. Every type in C# directly or indirectly derives from the object class type.

The keyword object is simply an alias for the predefined class System.Object.

3. The dynamic type

The dynamic type, like object, can reference any object. When operators are applied to expressions of type dynamic, their resolution is deferred until the program is run. Thus, if the operator cannot legally be applied to the referenced object, no error is given during compilation. Instead an exception will be thrown when resolution of the operator fails at run-time.

The dynamic type is further described in §4.7, and dynamic binding in §7.2.2.

4.