Sorted:

How to check a var for null value?-Collection of common programming errors

CatalogContext object VS CommerceContext.Current.CatalogSystem-Collection of common programming errors

finding the Delegate Method registered to an Event-Collection of common programming errors

JSP compile errors when using include directive-Collection of common programming errors

Binding exception with dynamic keyword in c#-Collection of common programming errors

Querying with ADODB::Connection.Execute()-Collection of common programming errors

Can a dynamic method in C# 4 be used to return a different data type with each call?-Collection of common programming errors

at runtime, how can I tell if I'm on WinXP+? win32-Collection of common programming errors

Input and load application files in a program-Collection of common programming errors

How can I specify T4 (Text Templates) to use C# 4.0, in VS2010?-Collection of common programming errors