C# 数组合并不重复

Question

假设我有这两个数组:

string[] arr1 = new string[2]{"Hello", "Stack"}
string[] arr2 = new string[2]{"Stack", "Overflow"}

我如何合并它们以获得第三个数组，如下所示:string[3]{"Hello", "Stack", "Overflow"}？

Answer 1

string[] arr1 = new string[2]{"Hello", "Stack"};
string[] arr2 = new string[2] { "Stack", "Overflow" };

var arr3 = arr1.Union(arr2).ToArray<string>();