C# 按条件去重

添加这段代码即可。

public class CommonEqualityComparer<T, V> : IEqualityComparer<T>    {       private Func<T, V> keySelector;       public CommonEqualityComparer(Func<T, V> keySelector)       {          this.keySelector = keySelector;       }       public bool Equals(T x, T y)       {          return EqualityComparer<V>.Default.Equals(keySelector(x), keySelector(y));       }       public int GetHashCode(T obj)       {          return EqualityComparer<V>.Default.GetHashCode(keySelector(obj));       }    }    public static class DistinctExtensions    {       public static IEnumerable<T> Distinct<T, V>(this IEnumerable<T> source, Func<T, V> keySelector)       {          return source.Distinct(new CommonEqualityComparer<T, V>(keySelector));       }    }

参考链接： https://cloud.tencent.com/developer/article/1344620