The anonymous types article was outdated and didn't address tuples, which are the preferred choice in modern C# for most scenarios where anonymous types were traditionally used.

Changes

• Added prominent TIP callout recommending tuples as the preferred choice with clear guidance on when to use each type
• New comparison section with table contrasting anonymous types vs tuples across key dimensions: type (reference/value), performance (heap/stack), mutability, deconstruction support, expression tree support, access modifiers, and member naming
• When to use guidance for both types with specific scenarios
• Code example demonstrating tuple equivalence to anonymous types with deconstruction
• See also section linking to tuple types reference and "Choosing between anonymous and tuple types" article

Example

The article now includes practical comparison:

// Anonymous type example
var anonymousProduct = new { Name = "Widget", Price = 19.99M };
Console.WriteLine($"Anonymous: {anonymousProduct.Name} costs ${anonymousProduct.Price}");

// Equivalent using tuple with named elements
var tupleProduct = (Name: "Widget", Price: 19.99M);
Console.WriteLine($"Tuple: {tupleProduct.Name} costs ${tupleProduct.Price}");

// Tuples support deconstruction
var (productName, productPrice) = tupleProduct;
Console.WriteLine($"Deconstructed: {productName} costs ${productPrice}");

The article maintains coverage of anonymous types while clearly establishing tuples as the modern default choice.

• Fixes Update Anonymous types article to cover tuples #49291

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