NETNewDelegate[type, func] creates a new instance of the specified .NET delegate type whose action is to call the named Mathematica function when triggered.
NETNew[type] constructs a new object of the specified .NET type. NETNew[type, args...] constructs a new object of the specified .NET type, passing the supplied argument ...
NETObjectQ[expr] gives True if expr is a valid reference to a .NET object, and False otherwise.
NETObjectToExpression[netObject] converts the specified .NET object reference into its value as a "native" Mathematica expression.
NETTypeInfo[type] prints information about the specified type, including its inheritance hierarchy, assembly name, and its public members (constructors, methods, properties, ...
NETType["name", n] represents a .NET type with the specified name.
NETUILink[] returns the MathLink LinkObject used by calls to Mathematica that originate from .NET user-interface actions, or Null if no such link is present.
ReferencedAssemblies is an option to DefineDLLFunction that specifies assemblies needed to compile your function declaration.
ReinstallNET[] is a convenience function that calls UninstallNET[] and then InstallNET[].
ReleaseNETObject[obj] tells the .NET memory-management system to forget any references to the specified NETObject that are being maintained solely for the sake of Mathematica.