Added PathHelper

PathHelper.cs

@@ -0,0 +1,53 @@
+// /**
+//  * File: PathHelper.cs
+//  * Author: haraldwolff
+//  *
+//  * This file and it's content is copyrighted by the Author and / or copyright holder.
+//  * Any use wihtout proper permission is illegal and may lead to legal actions.
+//  *
+//  *
+//  **/
+using System;
+using System.Collections.Generic;
+using System.Collections;
+using System.IO;
+namespace ln.types
+{
+    public static class PathHelper
+    {
+        public static string FindPath(params string[] search) => FindPath((IEnumerable<string>)search);
+        public static string FindPath(IEnumerable<string> search)
+        {
+            foreach (string p in search)
+            {
+                if (Directory.Exists(p) || File.Exists(p))
+                    return Path.GetFullPath(p);
+            }
+            return null;
+        }
+
+        public static string FindDirectory(params string[] search) => FindPath((IEnumerable<string>)search);
+        public static string FindDirectory(IEnumerable<string> search)
+        {
+            foreach (string p in search)
+            {
+                if (Directory.Exists(p))
+                    return Path.GetFullPath(p);
+            }
+            return null;
+        }
+
+        public static string FindFile(string filename, params string[] search) => FindFile(filename, (IEnumerable<string>)search);
+        public static string FindFile(string filename, IEnumerable<string> search)
+        {
+            foreach (string p in search)
+            {
+                String path = Path.Combine(p, filename);
+                if (File.Exists(path))
+                    return path;
+            }
+            return null;
+        }
+
+    }
+}

ln.types.csproj

@@ -95,6 +95,7 @@
     <Compile Include="odb\ng\index\SimpleIndex.cs" />
     <Compile Include="odb\ng\index\Path.cs" />
     <Compile Include="odb\ng\index\IndexPath.cs" />
+    <Compile Include="PathHelper.cs" />
   </ItemGroup>
   <ItemGroup>
     <Folder Include="odb\" />