Learn: Strategy
Put each version of an algorithm behind the same shape, and choose one at run time. No growing if/else chain.
```csharp
Func<decimal, decimal> blackFriday = p => p * 0.7m;
Console.WriteLine(Checkout(100m, blackFriday));
static decimal Checkout(decimal price, Func<decimal, decimal> discount) => discount(price);
```
It prints 70.0 (decimal keeps one decimal place from 0.7).
In C#, a strategy can be an interface or just a Func. Use it for pricing rules, sorting orders, payment methods.
Read more: https://www.geeksforgeeks.org/system-design/strategy-pattern-set-1/
#tip · TIP-053
codementor
npub1u6…v0yg2
2026-10-15 18:38:05 UTC
Author Public Key
npub1u69qs4hfpkve0v0hy85s2fycjeqjm4ts8xdfs7ew3l270l87yfuspv0yg2Seen on
wss://nos.lolPublished at
2026-10-15 18:38:05 UTCEvent JSON
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"content": "Learn: Strategy\n\nPut each version of an algorithm behind the same shape, and choose one at run time. No growing if/else chain.\n\n```csharp\nFunc\u003cdecimal, decimal\u003e blackFriday = p =\u003e p * 0.7m;\nConsole.WriteLine(Checkout(100m, blackFriday));\n\nstatic decimal Checkout(decimal price, Func\u003cdecimal, decimal\u003e discount) =\u003e discount(price);\n```\n\nIt prints 70.0 (decimal keeps one decimal place from 0.7).\nIn C#, a strategy can be an interface or just a Func. Use it for pricing rules, sorting orders, payment methods.\n\nRead more: https://www.geeksforgeeks.org/system-design/strategy-pattern-set-1/\n\n#tip · TIP-053",
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