new folder structure and new C# script host

src/Misc/ExtensionMethods.cs

@@ -0,0 +1,78 @@
+
+using System.Globalization;
+using System.IO;
+
+public static class Extensions
+{
+    public static bool ContainsEx(this string instance, string value)
+    {
+        if (instance != null && value != null)
+            return instance.Contains(value);
+
+        return false;
+    }
+
+    public static bool StartsWithEx(this string instance, string value)
+    {
+        if (instance != null && value != null)
+            return instance.StartsWith(value);
+
+        return false;
+    }
+
+    public static string ToUpperEx(this string instance)
+    {
+        if (instance != null)
+            return instance.ToUpper();
+
+        return "";
+    }
+
+    public static string ToLowerEx(this string instance)
+    {
+        if (instance != null)
+            return instance.ToLower();
+
+        return "";
+    }
+
+    public static string FileName(this string instance)
+    {
+        if (string.IsNullOrEmpty(instance))
+            return "";
+
+        int index = instance.LastIndexOf('\\');
+
+        if (index > -1)
+            return instance.Substring(index + 1);
+
+        index = instance.LastIndexOf('/');
+
+        if (index > -1)
+            return instance.Substring(index + 1);
+
+        return instance;
+    }
+
+    public static string Ext(this string instance)
+    {
+        if (instance == null)
+            return "";
+
+        return Path.GetExtension(instance).TrimStart('.').ToLower();
+    }
+
+    public static int ToInt(this string instance)
+    {
+        int.TryParse(instance, out int result);
+        return result;
+    }
+
+    public static float ToFloat(this string instance)
+    {
+        float.TryParse(instance.Replace(",", "."), NumberStyles.Float,
+            CultureInfo.InvariantCulture, out float result);
+
+        return result;
+    }
+}