Aardio Syntax Highlighter for SublimeText 3, place it inside Data/Packages/User directory

Aardio.sublime-syntax

%YAML 1.2
---
# http://www.sublimetext.com/docs/3/syntax.html
name: Aardio
file_extensions: [aardio, aau]
scope: source.aardio
contexts:
  main:
    - match: '^\s*(import)\s+([^ ;]*);'
      scope: meta.keyword.using.source.aardio
      captures:
        1: keyword.other.using.source.aardio
    - match: '^\s*((namespace)\s+([\w.]+))'
      captures:
        1: meta.namespace.identifier.source.aardio
        2: keyword.other.namespace.source.aardio
        3: entity.name.type.namespace.source.aardio
      push:
        - meta_scope: meta.namespace.source.aardio
        - match: "}"
          scope: punctuation.section.namespace.end.source.aardio
          pop: true
        - match: "{"
          scope: punctuation.section.namespace.begin.source.aardio
          push:
            - meta_scope: meta.namespace.body.source.aardio
            - match: "(?=})"
              pop: true
            - include: code
    - include: code
  block:
    - match: "{"
      scope: punctuation.section.block.begin.source.aardio
      push:
        - meta_scope: meta.block.source.aardio
        - match: "}"
          scope: punctuation.section.block.end.source.aardio
          pop: true
        - include: code
  builtinTypes:
    - match: \b(bool|byte|sbyte|char|decimal|double|float|int|uint|long|ulong|object|short|ushort|string|void|class|struct|enum|interface)\b
      scope: storage.type.source.aardio
  class:
    - match: '(?=\w?[\w\s]*(?:class|struct|interface|enum)\s+\w+)'
      push:
        - meta_scope: meta.class.source.aardio
        - match: "}"
          scope: punctuation.section.class.end.source.aardio
          pop: true
        - include: storage-modifiers
        - include: comments
        - match: (class|struct|interface|enum)\s+(\w+)
          scope: meta.class.identifier.source.aardio
          captures:
            1: storage.modifier.source.aardio
            2: entity.name.type.class.source.aardio
        - match: ":"
          push:
            - match: "(?={)"
              pop: true
            - match: '\s*,?([A-Za-z_]\w*)\b'
              captures:
                1: storage.type.source.aardio
        - match: "{"
          scope: punctuation.section.class.begin.source.aardio
          push:
            - meta_scope: meta.class.body.source.aardio
            - match: "(?=})"
              pop: true
            - include: method
            - match: '='
              scope: keyword.operator.assignment.aardio
              push:
                - match: ';'
                  pop: true
                - include: code
            - include: code
  code:
    - include: block
    - include: comments
    - include: class
    - include: constants
    - include: storage-modifiers
    - include: keywords
    - include: preprocessor
    - include: method-call
    - include: builtinTypes
  comments:
    - match: ///
      scope: punctuation.definition.comment.source.aardio
      push:
        - meta_scope: comment.block.documentation.source.aardio
        - match: $\n?
          scope: punctuation.definition.comment.source.aardio
          pop: true
        - include: scope:text.xml
    - match: /\*\*\s*intellisense
      scope: punctuation.definition.comment.intellisense.source.aardio
      push:
        - meta_scope: comment.intellisense.block.source.aardio
        - match: \*\*/\n?
          scope: punctuation.definition.comment.intellisense.source.aardio
          pop: true
    - match: /\*
      scope: punctuation.definition.comment.source.aardio
      push:
        - meta_scope: comment.block.source.aardio
        - match: \*/\n?
          scope: punctuation.definition.comment.source.aardio
          pop: true
    - match: //
      scope: punctuation.definition.comment.source.aardio
      push:
        - meta_scope: comment.line.double-slash.source.aardio
        - match: $\n?
          pop: true
  constants:
    - match: \b(true|false|null|this|base)\b
      scope: constant.language.source.aardio
    - match: '\b((0(x|X)[0-9a-fA-F]*)|(([0-9]+\.?[0-9]*)|(\.[0-9]+))((e|E)(\+|-)?[0-9]+)?)(L|l|UL|ul|u|U|F|f|ll|LL|ull|ULL)?\b'
      scope: constant.numeric.source.aardio
    - match: '@"'
      scope: punctuation.definition.string.begin.source.aardio
      push:
        - meta_scope: string.quoted.double.literal.source.aardio
        - match: '""'
          scope: constant.character.escape.source.aardio
        - match: '"'
          scope: punctuation.definition.string.end.source.aardio
          pop: true
    - match: '"'
      scope: punctuation.definition.string.begin.source.aardio
      push:
        - meta_scope: string.quoted.double.source.aardio
        - match: '"'
          scope: punctuation.definition.string.end.source.aardio
          pop: true
    - match: "'"
      scope: punctuation.definition.string.begin.source.aardio
      push:
        - meta_scope: string.quoted.single.source.aardio
        - match: "'"
          scope: punctuation.definition.string.end.source.aardio
          pop: true
  keywords:
    - match: \b(if|else|elseif|while|for|foreach|in|do|return|continue|break|switch|case|default|goto|throw|try|catch|finally|lock|yield)\b
      scope: keyword.control.source.aardio
    - match: \b(from|where|select|group|into|orderby|join|let|on|equals|by|ascending|descending)\b
      scope: keyword.linq.source.aardio
    - match: \b(new|is|as|using|checked|unchecked|typeof|sizeof|override|readonly|stackalloc)\b
      scope: keyword.operator.source.aardio
    - match: \b(var|ctor|_object|def|event|delegate|add|remove|set|get|value)\b
      scope: keyword.other.source.aardio
  method:
    - include: attributes
    - match: '(?=\bnew\s+)(?=[\w<].*\s+)(?=[^=]+\()'
      push:
        - meta_scope: meta.new-object.source.aardio
        - match: "(?={|;)"
          pop: true
        - include: code
    - match: '(?!new)(?=[\w<].*\s+)(?=[^=]+\()'
      push:
        - meta_scope: meta.method.source.aardio
        - match: "(})|(?=;)"
          scope: punctuation.section.method.end.source.aardio
          pop: true
        - include: storage-modifiers
        - match: '([\w.]+)\s*\('
          captures:
            1: entity.name.function.source.aardio
          push:
            - meta_scope: meta.method.identifier.source.aardio
            - match: \)
              pop: true
            - include: parameters
        - match: '(?=\w.*\s+[\w.]+\s*\()'
          push:
            - meta_scope: meta.method.return-type.source.aardio
            - match: '(?=[\w.]+\s*\()'
              pop: true
            - include: builtinTypes
        - match: ':\s*(this|base)\s*\('
          captures:
            1: constant.language.source.cs
          push:
            - meta_scope: meta.method.base-call.source.aardio
            - match: \)
              pop: true
            - include: builtinTypes
        - include: comments
        - match: "{"
          scope: punctuation.section.method.begin.source.aardio
          push:
            - meta_scope: meta.method.body.source.aardio
            - match: "(?=})"
              pop: true
            - include: code
    - match: '(?!new)(?=[\w<].*\s+)(?=[^=]+\{)'
      push:
        - meta_scope: meta.property.source.aardio
        - match: "}"
          scope: punctuation.section.property.end.source.aardio
          pop: true
        - include: storage-modifiers
        - match: '([\w.]+)\s*(?={)'
          captures:
            1: entity.name.function.source.aardio
          push:
            - meta_scope: meta.method.identifier.source.aardio
            - match: "(?={)"
              pop: true
        - match: '(?=\w.*\s+[\w.]+\s*\{)'
          push:
            - meta_scope: meta.method.return-type.source.aardio
            - match: '(?=[\w.]+\s*\{)'
              pop: true
            - include: builtinTypes
        - match: "{"
          scope: punctuation.section.property.begin.source.aardio
          push:
            - meta_scope: meta.method.body.source.aardio
            - match: "(?=})"
              pop: true
            - include: code
  method-call:
    - match: '([\w$]+)(\()'
      captures:
        1: meta.method.source.aardio
        2: punctuation.definition.method-parameters.begin.source.aardio
      push:
        - meta_scope: meta.method-call.source.aardio
        - match: \)
          scope: punctuation.definition.method-parameters.end.source.aardio
          pop: true
        - match: ","
          scope: punctuation.definition.separator.parameter.source.aardio
        - include: code
  attributes:
    - match: '\['
      push:
        - meta_scope: meta.method.attribute.source.aardio
        - match: '\]'
          pop: true
        - include: constants
        - include: preprocessor
        - include: builtinTypes
  parameters:
    - include: attributes
    - match: '\b(ref|params|out)?\s*\b([\w.\[\]]+)\s+(\w+)\s*(=)?'
      captures:
        1: storage.type.modifier.source.aardio
        2: storage.type.generic.source.aardio
        3: variable.parameter.function.source.aardio
        4: keyword.operator.assignment.source.aardio
      push:
        - match: '(,)|(?=[\)])'
          scope: punctuation.definition.separator.parameter.source.aardio
          pop: true
        - include: constants
        - include: block
  preprocessor:
    - match: ^\s*#\s*(region)\b(.*)$
      scope: meta.preprocessor.source.aardio
      captures:
        2: meta.toc-list.region.source.aardio
    - match: ^\s*#\s*(define)\b\s*(\S*)
      scope: meta.preprocessor.source.aardio
      captures:
        2: entity.name.function.preprocessor.source.aardio
    - match: ^\s*#\s*(if|else|elif|endif|define|undef|warning|error|line|pragma|region|endregion)\b
      scope: meta.preprocessor.source.aardio
      captures:
        2: keyword.control.import.source.aardio
  storage-modifiers:
    - match: \b(event|delegate|internal|public|protected|private|static|const|new|sealed|abstract|virtual|override|extern|unsafe|readonly|volatile|implicit|explicit|operator|partial)\b
      scope: storage.modifier.source.aardio