Add comments to records - C# 9

Add comments to records - C# 9

In C# 9, you can add comments to records using the same syntax as for classes, interfaces, and other types. You can add a comment to a record by preceding the declaration with a triple-slash (///) comment block. For example:

/// <summary> /// Represents a person with a name and age. /// </summary> public record Person(string Name, int Age);

The <summary> tag in the comment block is used to provide a summary of what the record represents. You can also include other tags, such as <remarks> or <example>, to provide additional information about the record.

You can use the same syntax to add comments to properties and other members of the record. For example:

public record Person(string Name, int Age) { /// <summary> /// Gets the full name of the person. /// </summary> public string FullName => $"{Name} ({Age})"; }

Adding comments to your code is a best practice that can make your code more readable and understandable to other developers.

Examples

  1. C# 9 record with XML comments for properties

    /// <summary> /// Represents a person with a name and age. /// </summary> public record Person { /// <summary> /// Gets or sets the name of the person. /// </summary> public string Name { get; init; } /// <summary> /// Gets or sets the age of the person. /// </summary> public int Age { get; init; } }

    Description: Adds XML comments to a C# 9 record, providing documentation for properties.

  2. C# 9 record with comments for constructor parameters

    /// <summary> /// Represents a book with a title and author. /// </summary> public record Book(string Title, string Author) { // Add comments for constructor parameters if necessary }

    Description: Includes comments for constructor parameters in a C# 9 record.

  3. C# 9 record with comments for positional pattern matching

    var book = new Book("C# in Depth", "Jon Skeet"); switch (book) { case { Title: "C# in Depth" }: // Add comments for the pattern matching case break; // Add more pattern matching cases as needed }

    Description: Adds comments for cases in a switch statement using positional pattern matching with C# 9 records.

  4. C# 9 record with comments for with-expressions

    var originalPerson = new Person { Name = "John", Age = 30 }; var updatedPerson = originalPerson with { Age = 31 }; // Add comments for the with-expression

    Description: Provides comments for the with-expression used to create a copy of a C# 9 record with modified values.

  5. C# 9 record with comments for equality

    public record Point(int X, int Y) { // Add comments for equality members if necessary }

    Description: Adds comments for equality members (Equals, GetHashCode, and == operator) in a C# 9 record.

  6. C# 9 record with comments for deconstruction

    var person = new Person { Name = "Alice", Age = 25 }; var (name, age) = person; // Add comments for the deconstruction

    Description: Includes comments for deconstruction of a C# 9 record.

  7. C# 9 record with comments for conversion operators

    public record Temperature(double Celsius) { // Add comments for conversion operators if necessary public static implicit operator Temperature(double celsius) => new Temperature(celsius); public static implicit operator double(Temperature temperature) => temperature.Celsius; }

    Description: Adds comments for conversion operators in a C# 9 record.

  8. C# 9 record with comments for ToString() override

    public record Product(string Name, decimal Price) { // Add comments for the ToString() override if necessary public override string ToString() => $"{Name} - ${Price}"; }

    Description: Includes comments for the ToString() override in a C# 9 record.

  9. C# 9 record with comments for record struct

    /// <summary> /// Represents a 2D point with X and Y coordinates. /// </summary> public record struct Point(int X, int Y) { // Add comments for the struct record if necessary }

    Description: Adds comments for a C# 9 record declared as a struct.

  10. C# 9 record with comments for records in inheritance

    /// <summary> /// Represents a person with additional information. /// </summary> public record DetailedPerson : Person { /// <summary> /// Gets or sets the address of the person. /// </summary> public string Address { get; init; } }

    Description: Includes comments for a C# 9 record that inherits from another record, providing additional properties.

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