Loading an Assemby and Creating an Object by Reflection

// Load the containing assembly
Assembly assembly = Assembly.LoadFrom(assemblyPath);
// Get the full name for the object including namespace
string objName = ProjConfig.Instance.NamespaceName
 + "." + className;
// Create the object
obj = assembly.CreateInstance(objName);
// Convert to required class or interface
Thingy myThingy = obj as Thingy;