You actually have the XmlIncludeAttribute specified twice! Remember that languages like C#, VB.NET, and MC++ don't require the "Attribute" suffix, though some languages might (it depends on the compiler). Simply:
[WebMethod]
[XmlInclude(typeof(CTestClass))]
public bool GetObject(object obj)
{
if (obj is CTestClass) return true;
return true;
}
And make sure that the assembly in which CTestClass is defined is referenced as a dependent assembly (or in the Web Service assembly itself, although this doesn't make any sense since the client can't use the type (even if retyped, since a Type is defined by its namespace, class name, assembly name, and public key token).
-----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK-----
