This extension for StarUML(http://staruml.io) support to generate C# code from UML model and to reverse Java code to UML model. Install this extension from Extension Manager of StarUML. It is based on C# 2.0 specification.

1. Click the menu (Tools > C# > Generate Code...)
2. Select a base model (or package) that will be generated to C#.
3. Select a folder where generated C# source files will be placed.

Belows are the rules to convert from UML model elements to Java source codes.

• converted to C# namespace (as a folder).

• converted to C# Class. (as a separate .cs file)
• visibility to one of modifiers public, protected, private and none.
• isAbstract property to abstract modifier.
• isFinalSpecification and isLeaf property to sealed modifier.
• Default constructor is generated.
• All contained types (UMLClass, UMLInterface, UMLEnumeration) are generated as inner type definition.
• Documentation property to C#Doc comment.
• Annotation Type is converted to C# attribute class which extends System.Attribute and postfix of class is Attribute. (cf. class testAttribute:System.Attribute)

• converted to C# Field.
• visibility property to one of modifiers public, protected, private and none.
• name property to field identifier.
• type property to field type.
• multiplicity property to array type.
• isStatic property to static modifier.
• isLeaf property to sealed modifier.
• defaultValue property to initial value.
• Documentation property to C#Doc comment.

• converted to C# Methods.
• visibility property to one of modifiers public, protected, private and none.
• name property to method identifier.
• isAbstract property to abstract modifier.
• isStatic property to static modifier.
• UMLParameter to C# Method Parameters.
• UMLParameter's name property to parameter identifier.
• UMLParameter's type property to type of parameter.
• UMLParameter with direction = return to return type of method. When no return parameter, void is used.
• UMLParameter with isReadOnly = true to sealed modifier of parameter.
• Documentation property to C#Doc comment.

• converted to C# Interface. (as a separate .cs file)
• visibility property to one of modifiers public, protected, private and none.
• Documentation property to C#Doc comment.

• converted to C# enum. (as a separate .cs file)
• visibility property to one of modifiers public, protected, private and none.
• UMLEnumerationLiteral to literals of enum.

• converted to C# Field.
• visibility property to one of modifiers public, protected, private and none.
• name property to field identifier.
• type property to field type.
• If multiplicity is one of 0..*, 1..*, *, then collection type (List<> when isOrdered = true or HashSet<>) is used.
• defaultValue property to initial value.
• Documentation property to JavaDoc comment.

• converted to C# Extends (:).
• Allowed only for UMLClass to UMLClass, and UMLInterface to UMLInterface.

• converted to C# Implements (:).
• Allowed only for UMLClass to UMLInterface.