Kotlin for C# Developers

0.1. Basics

Naming

Kotlin follows Java naming conventions:

• PascalCase for type names
• camelCase for variable, function and method names
• SCREAMING_CASE for constants and enum values

Scope

Variables and functions can be declared at:

• file scope (globals)
• local scope (variables and local functions)
• type scope (fields, properties and methods in a class, object or interface)

Visibility

Kotlin has the following visibility modifiers:

• public: same as C#
• private: same as C#… plus can be used at file scope to limit access to this file
• protected: same as C#
• internal: similar to C# - visible to the current “module” (a set of files that are compiled together e.g. Maven/Gradle project, IntelliJ project)

The default for everything is public.

C#

class ImplicitlyInternal
{
    void ImplicitlyPrivate()
    {
    }
}

Kotlin

class ImplicitlyPublic {
    fun implicitlyPublic() {
    }
}

Next: Variables

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