Downcasting

[Me]

From C# Language Specification, 7.6.6 Cast expressions:
--------------------------------------------------------------------
A cast-expression of the form (T)E, where T is a type and E is a
unary-expression, performs an explicit conversion (Section 6.2) of the value
of E to type T. If no explicit conversion exists from the type of E to T, a
compile-time error occurs.
--------------------------------------------------------------------
Object E;
....
Foo F = (Foo)E;

There is no explicit conversion from Object to Foo, but the compiler can't
throw an error - whether the conversion will work isn't known until runtime.

[Telmo Sampaio]

And?

Telmo Sampaio
MCT

"Me" <[e-mail]> wrote in message
news:03**********************************@microsof t.com...

From C# Language Specification, 7.6.6 Cast expressions:
--------------------------------------------------------------------
A cast-expression of the form (T)E, where T is a type and E is a
unary-expression, performs an explicit conversion (Section 6.2) of the
value
of E to type T. If no explicit conversion exists from the type of E to T,
a
compile-time error occurs.
--------------------------------------------------------------------
Object E;
...
Foo F = (Foo)E;

There is no explicit conversion from Object to Foo, but the compiler can't
throw an error - whether the conversion will work isn't known until
runtime.