用于空白的C＃字符串存储

Question

I'm asking if there's a difference between the following two strings:

string s1 = "Hello World";
string s2 = "Hello" + " " + "World";

because "Hello" + " " + "World" is working for me with List functions like .Any() .Contains() and .Equals() whereas "Hello World" doesn't work for these functions here.

Answer 1

the simple answer is that there is no difference!

The IEnumerable extension methods (also called LINQ for objects) you mentioned (.Any() etc.) work on both strings as string implements IEnumerable<char>

example:

string s1 = "Hello World";
string s2 = "Hello" + " " + "World";

Console.WriteLine(string.Concat(s1.Select(s => s.ToString())));
Console.WriteLine(string.Concat(s2.Select(s => s.ToString())));

output:

Hello World
Hello World

try it: https://dotnetfiddle.net/BKTMHj