我有两个数组：

 的String [] ARRAY1 = {红，蓝，绿，黑};
字符串[] ARRAY2 = {蓝，黄，黑};
 

我只需要匹配的字符串在一个阵列中（不区分大小写）。

结果应该是：

 的String []的结果= {蓝，黑}或{蓝，黑};
 

解决方案

怎么样的 Enumerable.Intersect 和StringComparer组合：

  //其他选项包括StringComparer.CurrentCultureIgnoreCase
//或StringComparer.InvariantCultureIgnoreCase
VAR的结果= array1.Intersect（ARRAY2，StringComparer.OrdinalIgnoreCase）;
 

I have two arrays:

string[] array1 = { "Red", "blue", "green", "black" };
string[] array2 = { "BlUe", "yellow", "black" };

I need only the matching strings in one array (ignoring case).

Result should be:

string[] result = { "blue", "black" } or { "BlUe", "black" };

How about an Enumerable.Intersect and StringComparer combo:

// other options include StringComparer.CurrentCultureIgnoreCase
// or StringComparer.InvariantCultureIgnoreCase
var results = array1.Intersect(array2, StringComparer.OrdinalIgnoreCase);