// class declaration
public class ChocolateFabric : IChocolateFabric {
  ...
}

// HappyReflection code      
IList<Type> aListContainingChocolateFabric = HappyReflection.GetClassesByInterface<IChocolateFabric>();

// result 
new List<Type> { typeof(ChocolateFabric) }

// class declaration
public class ChocolateFabric {
  ...
}

// HappyReflection code    
Type typeOfChocolateFabric = HappyReflection.GetTypeByName("ChocolateFabric");

// result   
typeof(ChocolateFabric)

// class declaration
[ILoveChocolateAttribute]
public class ChocolateFabric {
  ...
}

// HappyReflection code    
IList<Type> typeOfChocolateFabric = HappyReflection.GetClassesByAttribute<ILoveChocolateAttribute>();

// result   
new List<Type> { typeof(ChocolateFabric) }