31 lines
622 B
C#
31 lines
622 B
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Linq.Expressions;
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class Person
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{
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public int Age { get; set; }
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}
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class Repro
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{
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public static int Main ()
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{
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var persons = GetPersons (new [] { new Person { Age = 25 }, new Person { Age = 21 } }, 25);
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return persons.Count () - 1;
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}
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static IEnumerable<T> GetPersons<T> (IEnumerable<T> persons, int age) where T : Person
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{
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foreach (var person in persons)
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if (Test (person, p => p.Age == age))
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yield return person;
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}
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static bool Test<T> (T t, Expression<Func<T, bool>> predicate)
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{
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return predicate.Compile () (t);
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}
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}
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