From d7852e45c9045f1ffb2843750cb7274c1eab73d2 Mon Sep 17 00:00:00 2001
From: ig <ig ig@devnullmail.com>
Date: Mon, 20 Mar 2023 12:53:03 +0100
Subject: [PATCH] add missing EnsureStartsWith

---
 csharp/Lib/Utils/StringUtils.cs | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/csharp/Lib/Utils/StringUtils.cs b/csharp/Lib/Utils/StringUtils.cs
index e0ee21746..46372e381 100644
--- a/csharp/Lib/Utils/StringUtils.cs
+++ b/csharp/Lib/Utils/StringUtils.cs
@@ -352,6 +352,34 @@ public static class StringUtils
     }
 
 
+    public static String TrimStart(this String target, String trimString)
+    {
+        if (String.IsNullOrEmpty(trimString)) return target;
+
+        var result = target;
+        while (result.StartsWith(trimString))
+            result = result[trimString.Length..];
+
+        return result;
+    }
+
+
+    public static String TrimEnd(this String target, String trimString)
+    {
+        if (String.IsNullOrEmpty(trimString)) 
+            return target;
+
+        var result = target;
+        while (result.EndsWith(trimString))
+            result = result[..^trimString.Length];
+
+        return result;
+    }
+
+    public static String EnsureStartsWith(this String target, String prefix)
+    {
+        return $"{prefix}{target.TrimStart(prefix)}";
+    }
 
 
 }
\ No newline at end of file