I got this error message when I added the IsNullable="true" attribute to a d
ata type of System.Decimal in DataTypes.cs that got automatically generated 
from my orchestration when I exposed it as a web service. Surely there is a 
problem here because the sc
hema in my orchestration has nillable="true" for certain decimal datatypes. 
I would expect the XmlSerializer to support this too but apparently it does 
not like it. Is this a bug? If not, is there a workaround for this? This err
or message happens for Syst
em.DateTime also. However it works fine for strings and integers. Infact, it
 generates the IsNullable="true" automatically for these types in DataTypes.
cs. Can anybody tell me what I can do to overcome this problem...I cannot us
e just strings and integers
in my schema and I definitely need some of them to be nillable. Thanks!

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