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- Kilocode AI agent rules and guidelines - Setup and implementation guides - Architecture documentation - Build and verification references
89 lines
2.2 KiB
Markdown
89 lines
2.2 KiB
Markdown
# C# 5.0 Syntax Requirements
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You are working on a .NET Framework 4.8 project that MUST use C# 5.0 syntax only.
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## Forbidden C# 6+ Features
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### String Interpolation (C# 6)
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❌ NEVER use: `$"Order {orderId} at {price}"`
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✅ ALWAYS use: `string.Format("Order {0} at {1}", orderId, price)`
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### Null-Conditional Operators (C# 6)
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❌ NEVER use: `var name = order?.Name`
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❌ NEVER use: `var value = dict?[key]`
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✅ ALWAYS use explicit null checks:
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```csharp
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var name = order != null ? order.Name : null;
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if (dict != null && dict.ContainsKey(key)) { }
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```
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### Null-Coalescing Assignment (C# 8)
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❌ NEVER use: `value ??= defaultValue;`
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✅ ALWAYS use: `if (value == null) value = defaultValue;`
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### Expression-Bodied Members (C# 6)
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❌ NEVER use: `public int Property => value;`
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❌ NEVER use: `public void Method() => DoSomething();`
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✅ ALWAYS use full syntax:
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```csharp
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public int Property
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{
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get { return value; }
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}
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public void Method()
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{
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DoSomething();
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}
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```
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### nameof Operator (C# 6)
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❌ NEVER use: `throw new ArgumentNullException(nameof(param));`
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✅ ALWAYS use: `throw new ArgumentNullException("param");`
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### Auto-Property Initializers (C# 6)
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❌ NEVER use: `public int Property { get; set; } = 10;`
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✅ ALWAYS use constructor initialization:
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```csharp
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public int Property { get; set; }
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public ClassName()
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{
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Property = 10;
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}
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```
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### Using Static (C# 6)
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❌ NEVER use: `using static System.Math;`
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✅ ALWAYS use: `System.Math.Floor(...)`
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### Tuple Syntax (C# 7)
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❌ NEVER use: `var tuple = (name: "test", value: 1);`
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✅ ALWAYS use: `Tuple<string, int>` or custom classes
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### Pattern Matching (C# 7+)
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❌ NEVER use: `if (obj is string str)`
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✅ ALWAYS use: `if (obj is string) { var str = (string)obj; }`
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### Local Functions (C# 7)
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❌ NEVER use functions inside methods
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✅ ALWAYS use private methods
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### Out Variables (C# 7)
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❌ NEVER use: `if (dict.TryGetValue(key, out var value))`
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✅ ALWAYS use:
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```csharp
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OrderStatus value;
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if (dict.TryGetValue(key, out value))
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{
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// Use value
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}
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```
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## Verification
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After writing ANY code, verify C# 5.0 compliance:
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- No `$` signs except in string literals
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- No `?.` or `?[` operators
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- No `=>` except in lambda expressions
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- No inline variable declarations in out parameters
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