C# - Differens

C# extractor

The C# extractor maps tree-sitter C# CST nodes to canonical concepts. Class, method, and namespace names come from the standard name field; variable names come from the declarator.

Detected concepts

tree-sitter node type	Canonical concept
`class_declaration`	Class
`namespace_declaration`	Namespace
`using_directive`	Import
`method_declaration`	Method
`variable_declaration`	Variable
`parameter_list`	Parameters
`invocation_expression`	CallExpression
`member_access_expression`	MemberAccess
`conditional_expression`	TernaryOp
`predefined_type`	TypeIdentifier
`string_literal`	string_literal
`integer_literal`	integer_literal

Example

Renaming a method:

// old.cs
class Counter { int Total(int n) { return n + 1; } }

// new.cs
class Counter { int Sum(int n) { return n + 1; } }

Running differens old.cs new.cs:

~ renamed method `Total` to `Sum` in class `Counter`

Known limitations

Partial classes across files are correlated per file; the cross-file correlator pairs moved members when the whole changeset is diffed at once.
LINQ query syntax reports as call expressions, not query clauses.