ConditionalWeakTable> table = new ConditionalWeakTable >(); Person p1 = new Person("John", 25); table.Add(p1, new Dictionary () { { "City", "New York" }, { "Country", "USA" } }); Dictionary metadata = table.GetOrCreateValue(p1); metadata["Age"] = 26; Console.WriteLine(metadata["City"]); // Output: New York Console.WriteLine(metadata["Age"]); // Output: 26
public class MathUtils { private ConditionalWeakTableIn this example, we create a MathUtils class that implements a ComputeFibonacci method using a caching mechanism based on ConditionalWeakTable. We create a private cache field, and every time the method is called, it checks if the result for the given input n is already cached in the table. If it is, it returns the cached value; otherwise, it computes the Fibonacci sequence using the recursive formula and stores the result in the table. The method then returns the computed value. Package library: System.Runtime.CompilerServices.cache = new ConditionalWeakTable (); public int ComputeFibonacci(int n) { if (n == 0 || n == 1) { return n; } int result; if (cache.TryGetValue(n, out result)) { return result; } result = ComputeFibonacci(n - 1) + ComputeFibonacci(n - 2); cache.Add(n, result); return result; } } MathUtils mathUtils = new MathUtils(); Console.WriteLine(mathUtils.ComputeFibonacci(6)); // Output: 8