diff --git a/202508/3000 areaOfMaxDiagonal/C#/Program.cs b/202508/3000 areaOfMaxDiagonal/C#/Program.cs
new file mode 100644
index 0000000..ce53784
--- /dev/null
+++ b/202508/3000 areaOfMaxDiagonal/C#/Program.cs	
@@ -0,0 +1,38 @@
+public class Solution
+{
+    public int AreaOfMaxDiagonal(int[][] dimensions)
+    {
+        int max = 0;
+        int maxArea = 0;
+
+        foreach (var dimension in dimensions)
+        {
+            var dimensionSqrt = dimension[0] * dimension[0] + dimension[1] * dimension[1];
+            var area = dimension[0] * dimension[1];
+            if (dimensionSqrt > max)
+            {
+                max = dimensionSqrt;
+                maxArea = area;
+            }
+            else if (dimensionSqrt == max)
+            {
+                maxArea = Math.Max(maxArea, area);
+            }
+        }
+        return maxArea;
+    }
+}
+
+public class Program
+{
+    public static void Main()
+    {
+        var Solution = new Solution();
+
+        var dimensions = new int[][] { [6,5],[8,6],[2,10],[8,1],[9,2],[3,5],[3,5]};
+
+        var result = Solution.AreaOfMaxDiagonal(dimensions);
+        Console.WriteLine(result);
+    }
+}
+
diff --git a/202508/3000 areaOfMaxDiagonal/C#/areaOfMaxDiagonal.csproj b/202508/3000 areaOfMaxDiagonal/C#/areaOfMaxDiagonal.csproj
new file mode 100644
index 0000000..2150e37
--- /dev/null
+++ b/202508/3000 areaOfMaxDiagonal/C#/areaOfMaxDiagonal.csproj	
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>