Add C# Solution

doocs · Nov 4, 2023 · c20c0cc · c20c0cc
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diff --git a/solution/0300-0399/0349.Intersection of Two Arrays/README_EN.md b/solution/0300-0399/0349.Intersection of Two Arrays/README_EN.md
@@ -165,6 +165,27 @@ class Solution {
 }
 ```
 
+### **C#**
+
+```c#
+public class Solution {
+    public int[] Intersection(int[] nums1, int[] nums2) {
+        List<int> result = new List<int>();
+        HashSet<int> arr1 = new(nums1);
+        HashSet<int> arr2 = new(nums2);
+        foreach (int item in arr1)
+        {
+            if (arr2.Contains(item))
+            {
+                result.Add(item);
+            }
+        }
+       return result.ToArray();
+
+    }
+}
+```
+
 ### **...**
 
 ```

diff --git a/solution/0300-0399/0349.Intersection of Two Arrays/solution.cs b/solution/0300-0399/0349.Intersection of Two Arrays/solution.cs
@@ -0,0 +1,16 @@
+public class Solution {
+    public int[] Intersection(int[] nums1, int[] nums2) {
+        List<int> result = new List<int>();
+        HashSet<int> arr1 = new(nums1);
+        HashSet<int> arr2 = new(nums2);
+        foreach (int item in arr1)
+        {
+            if (arr2.Contains(item))
+            {
+                result.Add(item);
+            }
+        }
+       return result.ToArray();
+
+    }
+}