I had this bug: CS1061: Type `object’ does not contain a definition for [some property].
It took me a couple of hours to figure out that this is a minor bug in the “var” keyword in mono.
The problem occurs when “casting” a dynamic variable to var. In this process it is being treated as an Object by the compiler. E.g. something like:
dynamic d = some obj
var v = d;
v.MyProperty // CS1061 exception
In .NET, however, this works fine. To resolve the issue, rename the var keyword to dynamic.