Swift borrows some ideas from C#, along with Kotlin, ObjC, and others. It's also radically different from C#: 1. Swift collections and strings are value types,

Swift borrows some ideas from C#, along with Kotlin, ObjC, and others. It's also radically different from C#: 1. Swift collections and strings are value types, but in C# they are reference types 2. Swift strings are mutable, C# strings are not 3. C# by default allows reference types to be nil, Swift does not 4. Swift performs overflow checking by default, C# does not 5. Swift is reference counted, C# is GCed 6. Swift's inouts are very different from C#'s ref. For example, Swift's inouts support properties 7. Swift's error handling is quite different from C#'s exceptions, both in syntax and implementation 8. Swift's enums act as algebraic data types, C# has nothing like this 9. Swift's switch statements are much more flexible than C#, because of where clauses and more. These are some radical departures! The differences between Swift and C# are much greater than the differences between C# and Java.