ó not allowed in xml file but allowed in .net resource file?

i'm parsing a few .net resource files (.resx).

In that, i have this piece of data:

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This works in my .net app, but when i try to load this file in my xml document

XDocument xmlDoc = XDocument.Parse(s);

i get this error:

Reference to undeclared entity 'oacute'. 

Why is that?

ó is a named HTML entity that is not defined in XML.

XML only defines a subset of the named HTML entities (namely &, ', ", > and < if memory serves).

You can use the numeric entity representation instead:

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Or, in hexadecimal:

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The entity oacute is not declared by default for XML. Try ó instead. Here is a list of HTML entities with their corresponding codes, in case you have other similar problems.

If you'd prefer to continue using ó, you can define the entity yourself.

If you are using a DTD, you can define it thus

<!ENTITY oacute "&#243;">

Or if using Schema, thus:

<xsd:element name="oacute" type="xsd:token" fixed="&#243;"/>