diff --git a/README.md b/README.md
index f7fdde3..ab75211 100644
--- a/README.md
+++ b/README.md
@@ -82,3 +82,8 @@ if __name__ == "__main__":
 
 This repo contains a [sample file](https://github.com/kevsmith/code_golf/blob/main/input.txt) you can use for development.
 
+#### HOW TO RUN
+dotnet new console --use-program-main false
+Copy contents from TheFileLengthOfThisFileDoesntMatterAtAll.cs to Program.cs
+Delete TheFileLengthOfThisFileDoesntMatterAtAll.cs file
+dotnet run input.txt
diff --git a/TheFileLengthOfThisFileDoesntMatterAtAll.cs b/TheFileLengthOfThisFileDoesntMatterAtAll.cs
new file mode 100644
index 0000000..c63db56
--- /dev/null
+++ b/TheFileLengthOfThisFileDoesntMatterAtAll.cs
@@ -0,0 +1,19 @@
+using System;
+using System.IO;
+class Program{
+    static void Main(string[] args){
+        var values = new[]{1000,900,500,400,100,90,50,40,10,9,5,4,1};
+        var symbols = new[]{"M","CM","D","CD","C","XC","L","XL","X","IX","V","IV","I"};
+        foreach(var line in File.ReadLines(args[0])){
+            int number = int.Parse(line);
+            var roman = "";
+            for(int i = 0; i < values.Length; i++){
+                while(number >= values[i]){
+                    roman += symbols[i];
+                    number -= values[i];
+                }
+            }
+            Console.WriteLine(roman);
+        }
+    }
+}