Data Validation with Property Patterns

Snippet

Data Validation with Property Patterns

Property patterns allow you to match an object's properties against specific values or ranges directly within a switch expression. It provides a declarative way to handle complex conditional logic based on object state.

snippet.cs

csharp

public record User(string Name, int Age, bool IsActive);
 
public string GetUserStatus(User user) => user switch
{
    { IsActive: false } => "Account Disabled",
    { Age: < 18 } => "Minor Access",
    { Name: "Admin" } => "Full Access",
    _ => "Standard User"
};

Breakdown

{ IsActive: false } => "Account Disabled"

Matches if the IsActive property is specifically false.

{ Age: < 18 } => "Minor Access"

Uses a relational pattern to check if the Age property is less than 18.

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Data Validation with Property Patterns

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