Tag: Type Patterns

C#

C#: Use Pattern Matching in Property Patterns for Complex Conditions

- - ErcanOPAK comment on C#: Use Pattern Matching in Property Patterns for Complex Conditions

Nested if statements for object properties are messy. Property patterns make complex checks clean. Messy If-Else: if (user != null && user.Address != null && user.Address.Country == “USA” && user.Age >= 18) { return “Eligible”; } Clean Property Pattern: var result = user switch { { Address.Country: “USA”, Age: >= 18 } => “Eligible”, { […]

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C#

C#: Use var Pattern in Switch Expressions for Type Matching

- - ErcanOPAK comment on C#: Use var Pattern in Switch Expressions for Type Matching

Checking object types with multiple if-else is messy. Switch expressions with type patterns are cleaner. Old If-Else Chain: object obj = GetData(); if (obj is string s) { Console.WriteLine($”String: {s.Length} chars”); } else if (obj is int i) { Console.WriteLine($”Number: {i * 2}”); } else if (obj is List list) { Console.WriteLine($”List: {list.Count} items”); } […]

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C#

C# Pattern Matching: Replace Complex If-Else Chains with Switch Expressions

- - ErcanOPAK comment on C# Pattern Matching: Replace Complex If-Else Chains with Switch Expressions

Nested if-else statements making your code unreadable? C# 9+ switch expressions with pattern matching can reduce 50+ lines to 10. The Old Nightmare: public decimal CalculateDiscount(Customer customer, Order order) { if (customer == null) return 0; if (customer.IsPremium) { if (order.Total > 1000) return order.Total * 0.20m; else if (order.Total > 500) return order.Total * […]

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