c#
public class Token {
    public SortedSet<int> types;
    public List<Token> children;
    public string text;
    public TokenContext context;

    public Token(SortedSet<int> types, List<Token> children, TokenContext ctx) {
        this.types = types;
        this.children = children;
        this.text = ctx.source.GetText().Slice(ctx.start, ctx.end - ctx.start).ToString();
        this.context = ctx;
    }
...
}

c#
public class Token {
    public SortedSet<int> types;
    public List<Token> children;
    public string text;
    public TokenContext context;

    public Token(SortedSet<int> types, List<Token> children, TokenContext ctx) {
        this.types = types;
        this.children = children;
        this.text = ctx.source.GetText().Slice(ctx.start, ctx.end - ctx.start).ToString();
        this.context = ctx;
    }
...
}

c#
public class TokenContext {
    public Source source;
    public int start;
    public int end;
    public int line;
    public int col;
    public TokenContext(int start, int end, int line, int col, Source source) {
        this.source = source;
        this.start = start;
        this.end = end;
        this.line = line;
        this.col = col;
    }
}

c#
public class TokenContext {
    public Source source;
    public int start;
    public int end;
    public int line;
    public int col;
    public TokenContext(int start, int end, int line, int col, Source source) {
        this.source = source;
        this.start = start;
        this.end = end;
        this.line = line;
        this.col = col;
    }
}