From 5ed7e666da7c329292d5dcb80d23a86f86b21977 Mon Sep 17 00:00:00 2001
From: Dmitrii Ivashchenko <ivaschenko.dmitrii@gmail.com>
Date: Tue, 7 Nov 2023 21:44:32 +0100
Subject: [PATCH] Create 0171-excel-sheet-column-number.cs

---
 csharp/0171-excel-sheet-column-number.cs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 csharp/0171-excel-sheet-column-number.cs

diff --git a/csharp/0171-excel-sheet-column-number.cs b/csharp/0171-excel-sheet-column-number.cs
new file mode 100644
index 000000000..3e6b6b8ce
--- /dev/null
+++ b/csharp/0171-excel-sheet-column-number.cs
@@ -0,0 +1,16 @@
+public class Solution {
+    public int TitleToNumber(string columnTitle) {
+        int result = 0;
+        char[] chars = columnTitle.ToCharArray().Reverse().ToArray();
+
+        for (int index = 0; index < chars.Length; index++) {
+            char currentChar = chars[index];
+            int delta = currentChar - 'A' + 1;
+            int sum = delta * (int)Math.Pow(26, index);
+
+            result += sum;
+        }
+
+        return result;
+    }
+}
\ No newline at end of file