What is the difference between C# 1.0 and C# 2.0?

C# 1.0 introduced the core language features such as classes, interfaces, inheritance, and basic exception handling. C# 2.0, released with .NET Framework 2.0, added several significant enhancements. It introduced generics, allowing type-safe collections and reusable code without boxing. It added iterators and the foreach loop over IEnumerable, simplifying collection traversal. Partial classes and methods were added to support large codebases and separate code generation. Nullable types enabled value types to represent null. The new features improved performance, type safety, and developer productivity. In practice, generics replaced many ArrayList and Hashtable usages, while iterators made LINQ-style queries more natural. These changes made C# more robust and expressive compared to its first version.