Take the 2-minute tour ×  What naming conventions are you using
for namespaces and sponsor classes? (i.e. the classes that hold
extension method definitions)  Is there a standard/recommended
.NET Framework naming convention? (the "Framework Design
Guidelines, 2nd Edition" book only gives guidance on what
namespaces not to use).  share|improve this question add comment
2 Answers  up vote 4 down vote accepted  For the Namespace - I
would focus on the standard framework guidelines for namespace
names. Put the extension methods into a namespace where they
will typically be used/associated meaningfully, and avoid having
an extra namespace just for this.  For the sponsor class - in
this case, it's fairly unimportant. I would try to pick a class
name that is meaningful, but there does not seem to be a fixed
guideline.  The important thing here, though, is that the
sponsor class is never really directly used/seen by the user of
your extension methods. As long as the namespace has been
included, the extension method