Meta Description: Explore the five main custom types in .NET—classes, structs, enumerations, interfaces, and delegates. Learn how to effectively use and differentiate between value and reference types, with detailed examples and assignments to enhance your understanding. With an understanding of value types and reference types, let’s explore custom types in .NET. We will focus on the five main types available in .NET, which include classes, enumerations, structs, interfaces, and delegates.