Why does the C＃ compiler allow an explicit cast between IEnumerable＆lt; T＆gt; and TAlmostAnything?

problem ：

The following code gives you a compiler error, as you'd expect: The following code provides you with compiler errors , As you would expect ：

List<Banana> aBunchOfBananas = new List<Banana>();Banana justOneBanana = (Banana)aBunchOfBananas;

However, when using IEnumerable<Banana> , you merely get a runtime error. however , Use IEnumerable<Banana> , Only runtime errors will occur .

IEnumerable<Banana> aBunchOfBananas = new List<Banana>();Banana justOneBanana = (Banana)aBunchOfBananas;

Why does the C# compiler allow this? Why? C＃ The compiler allows this ？

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Solution ：

Reference resources ： https://stackoom.com/en/question/capE