347. Top K Frequent Elements

347. Top K Frequent Elements/347. Top K Frequent Elements.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net8.0</TargetFramework>
+        <RootNamespace>_347._Top_K_Frequent_Elements</RootNamespace>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+</Project>

347. Top K Frequent Elements/Program.cs

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+using _347._Top_K_Frequent_Elements;
+
+var sol = new Solution();
+Console.WriteLine(string.Join(", ", sol.TopKFrequent([1,1,1,2,2,3], 2)));

347. Top K Frequent Elements/Solution.cs

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+namespace _347._Top_K_Frequent_Elements;
+
+public class Solution
+{
+    public int[] TopKFrequent(int[] nums, int k)
+    {
+        var dictionary = new Dictionary<int, int>();
+        foreach (var num in nums)
+            if (!dictionary.TryAdd(num, 1))
+                dictionary[num]++;
+        return dictionary.OrderByDescending(kp=>kp.Value).Take(k).Select(kp=>kp.Key).ToArray();
+    }
+}