diff --git a/47 Hi-Lo/csharp/hi-lo.cs b/47 Hi-Lo/csharp/hi-lo.cs
new file mode 100644
index 00000000..c5cfb3ec
--- /dev/null
+++ b/47 Hi-Lo/csharp/hi-lo.cs	
@@ -0,0 +1,83 @@
+using System;
+
+Console.WriteLine(Tab(34) +                 "HI LO");
+Console.WriteLine(Tab(15) + "CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY");
+Console.WriteLine();
+Console.WriteLine();
+Console.WriteLine();
+Console.WriteLine("THIS IS THE GAME OF HI LO.");
+Console.WriteLine();
+Console.WriteLine("YOU WILL HAVE 6 TRIES TO GUESS THE AMOUNT OF MONEY IN THE");
+Console.WriteLine("HI LO JACKPOT, WHICH IS BETWEEN 1 AND 100 DOLLARS.  IF YOU");
+Console.WriteLine("GUESS THE AMOUNT, YOU WIN ALL THE MONEY IN THE JACKPOT!");
+Console.WriteLine("THEN YOU GET ANOTHER CHANCE TO WIN MORE MONEY.  HOWEVER,");
+Console.WriteLine("IF YOU DO NOT GUESS THE AMOUNT, THE GAME ENDS.");
+Console.WriteLine();
+
+// rnd is our random number generator
+Random rnd = new();
+
+bool playAgain = false;
+int totalWinnings = 0;
+
+do // Our game loop
+{
+    int jackpot = rnd.Next(100) + 1; // [0..99] + 1 -> [1..100]
+    int guess = 1;
+
+    while (true) // Our guessing loop
+    {
+        Console.WriteLine();
+        int amount = ReadInt("YOUR GUESS ");
+
+        if (amount == jackpot)
+        {
+            Console.WriteLine($"GOT IT!!!!!!!!!!   YOU WIN {jackpot} DOLLARS.");
+            totalWinnings += jackpot;
+            Console.WriteLine($"YOUR TOTAL WINNINGS ARE NOW {totalWinnings} DOLLARS.");
+            break;
+        }
+        else if (amount > jackpot)
+        {
+            Console.WriteLine("YOUR GUESS IS TOO HIGH.");
+        }
+        else
+        {
+            Console.WriteLine("YOUR GUESS IS TOO LOW.");
+        }
+
+        guess++;
+        if (guess > 6)
+        {
+            Console.WriteLine($"YOU BLEW IT...TOO BAD...THE NUMBER WAS {jackpot}");
+            break;
+        }
+    }
+
+    Console.WriteLine();
+    Console.Write("PLAY AGAIN (YES OR NO) ");
+    playAgain = Console.ReadLine().ToUpper().StartsWith("Y");
+
+} while (playAgain);
+
+Console.WriteLine();
+Console.WriteLine("SO LONG.  HOPE YOU ENJOYED YOURSELF!!!");
+
+// Tab(n) returns n spaces
+static string Tab(int n) => new String(' ', n);
+
+// ReadInt asks the user to enter a number
+static int ReadInt(string question)
+{
+    while (true)
+    {
+        Console.Write(question);
+        var input = Console.ReadLine().Trim();
+        if (int.TryParse(input, out int value))
+        {
+            return value;
+        }
+        Console.WriteLine("!Invalid Number Entered.");
+    }
+}
+
diff --git a/47 Hi-Lo/csharp/hi-lo.csproj b/47 Hi-Lo/csharp/hi-lo.csproj
new file mode 100644
index 00000000..20827042
--- /dev/null
+++ b/47 Hi-Lo/csharp/hi-lo.csproj	
@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net5.0</TargetFramework>
+  </PropertyGroup>
+
+</Project>