Day6. Namespace style

242. Valid Anagram/Solution.cs

@@ -0,0 +1,36 @@
+namespace _242._Valid_Anagram;
+
+public class Solution
+{
+    public bool IsAnagram(string s, string t)
+    {
+        Dictionary<char, int> d1 = CountChars(s);
+        Dictionary<char, int> d2 = CountChars(t);
+        if (d1.Count != d2.Count)
+            return false;
+        foreach (var kp in d1)
+        {
+            if (d2.ContainsKey(kp.Key))
+            {
+                if (d2[kp.Key] != kp.Value)
+                    return false;
+            }
+            else
+                return false;
+        }
+        return true;
+    }
+
+    private Dictionary<char, int> CountChars(string str)
+    {
+        Dictionary<char, int> dict = new Dictionary<char, int>();
+        foreach (char ch in str)
+        {
+            if (dict.ContainsKey(ch))
+                dict[ch]++;
+            else
+                dict.Add(ch, 1);
+        }
+        return dict;
+    }
+}