What is the difference between All and Any in C# Linq?

Any() 方法返回 true。否则，返回 false。另一方面，如果源序列中的每个元素都与提供的谓词匹配，则 All(<predicate>) 方法返回 true。否则，返回 false</predicate></predicate></p> <h2>示例</h2><pre class='brush:php;toolbar:false;'>static void Main(string[] args){ IEnumerable<double> doubles = new List<double> { 1.2, 1.7, 2.5, 2.4 }; bool result = doubles.Any(val => val < 1); System.Console.WriteLine(result); IEnumerable<double> doubles1 = new List<double> { 0.8, 1.7, 2.5, 2.4 }; bool result1 = doubles1.Any(val => val < 1); System.Console.WriteLine(result1); Console.ReadLine(); }

Output

False
True

Example

static void Main(string[] args){
   IEnumerable<double> doubles = new List<double> { 0.8, 0.9, 0.6, 0.7 };
   bool result = doubles.All(val => val < 1);
   System.Console.WriteLine(result);
   IEnumerable<double> doubles1 = new List<double> { 0.8, 0.9, 1.0, 0.7 };
   bool result1 = doubles1.All(val => val < 1);
   System.Console.WriteLine(result1);
   Console.ReadLine();
}

Output if at least one element in the source sequence matches the supplied predicate

True
False

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