csharp

Instruction file imported from foluis/Fifa-2026-flags-Getter (.github/instructions/csharp.instructions.md). Copyright stays with the author.

• Prefer straightforward code, avoid over-engineering.
• Use async/await for I/O.
• Add basic argument validation for public methods.
• Keep logic testable, avoid mixing UI concerns into services.
• Favor composition over inheritance.
• Use expression-bodied members for simple properties and methods.
• Prefer var for local variable declarations when the type is obvious.
• Use string interpolation ($"...") instead of String.Format.
• Use using statements for resource management.
• Follow .NET naming conventions: PascalCase for types and methods, camelCase for parameters and private fields.
• Write XML documentation comments for public APIs.
• Use LINQ for collections manipulation when appropriate.
• Avoid empty catch blocks; at least log the exception.