Enforced immutability: Difference between revisions
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m (C# added the case for readonly members of structs) |
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<lang csharp>public string Key { get; }</lang> |
<lang csharp>public string Key { get; }</lang> |
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On value types (which usually should be immutable from a design perspective), immutability can be enforced by applying the '''readonly''' modifier on the type. It will fail to compile if it contains any members that are not read-only. |
On value types (which usually should be immutable from a design perspective), immutability can be enforced by applying the '''readonly''' modifier on the type. It will fail to compile if it contains any members that are not read-only. |
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<lang csharp> |
<lang csharp>public readonly struct Point |
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{ |
{ |
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public Point(int x, int y) => (X, Y) = (x, y); |
public Point(int x, int y) => (X, Y) = (x, y); |
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public int X { get; } |
public int X { get; } |
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public int Y { get; } |
public int Y { get; } |
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}</lang> |
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On a struct that is not made readonly, individual methods or properties can be made readonly by applying the '''readonly''' modifier on that member. |
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<lang csharp>public struct Vector |
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{ |
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}</lang> |
}</lang> |
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