Question 1

How to parse a GraphQL query string in C# using GraphQL.NET Parser?

Accepted Answer

Use the `Parser.Parse` method with your query string; for example, `var ast = Parser.Parse("{ field }");` returns an AST document. You can customize parsing with `ParserOptions` to ignore comments or locations for better performance.

Question 2

GraphQL.NET Parser vs the full GraphQL.NET library – which should I use?

Accepted Answer

GraphQL.NET Parser is for low-level parsing and AST manipulation, while GraphQL.NET includes execution, validation, and server features. Use the parser if you need custom tooling or integration; for a full GraphQL server, use GraphQL.NET directly.

Question 3

How to print GraphQL SDL from an AST in .NET?

Accepted Answer

Use the `SDLPrinter` class; call `Print` or `PrintAsync` methods with your AST document. For example, `var sdl = new SDLPrinter().Print(document);` outputs formatted SDL, with options to control comments and line breaks.

Question 4

Does GraphQL.NET Parser work with .NET Core and .NET 5+?

Accepted Answer

Yes, it leverages modern .NET features like `ReadOnlyMemory<char>` and is available as a NuGet package, supporting .NET Standard 2.0 and above for compatibility with .NET Core, .NET 5, and later versions.

Question 5

How to ignore locations and comments when parsing to save memory?

Accepted Answer

Pass `ParserOptions` with `Ignore` set to `IgnoreOptions.Comments`, `IgnoreOptions.Locations`, or `IgnoreOptions.All`; for instance, `Parser.Parse(query, new ParserOptions { Ignore = IgnoreOptions.All });` minimizes heap allocations by skipping unnecessary data.

Question 6

GraphQL.NET Parser performance compared to other parsers like Hot Chocolate?

Accepted Answer

GraphQL.NET Parser is optimized for minimal memory allocation using `ReadOnlyMemory<char>`, but Hot Chocolate includes a full execution engine. For pure parsing tasks, GraphQL.NET Parser may offer better performance, but benchmark specific use cases as Hot Chocolate's parser is integrated into a larger ecosystem.

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