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EZPPClient Installer/Util.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Path = System.IO.Path;
+using File = System.IO.File;
+using Microsoft.Win32;
+
+namespace EZPPClient_Installer
+{
+  class Util
+  {
+    public static string osuInstallDir()
+    {
+      string path = "";
+      string registry_key = @"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall";
+      string second_registry_key = @"SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall";
+
+      using (Microsoft.Win32.RegistryKey key = Registry.LocalMachine.OpenSubKey(registry_key))
+      {
+        foreach (string subkey_name in key.GetSubKeyNames())
+        {
+          using (RegistryKey subkey = key.OpenSubKey(subkey_name))
+          {
+            if ((string)subkey.GetValue("DisplayName") == "osu!")
+            {
+              path = Path.GetDirectoryName(subkey.GetValue("DisplayIcon").ToString());
+            }
+          }
+        }
+      }
+
+      if (string.IsNullOrEmpty(path))
+      {
+        using (Microsoft.Win32.RegistryKey key = Registry.LocalMachine.OpenSubKey(second_registry_key))
+        {
+          foreach (string subkey_name in key.GetSubKeyNames())
+          {
+            using (RegistryKey subkey = key.OpenSubKey(subkey_name))
+            {
+              if ((string)subkey.GetValue("DisplayName") == "osu!")
+              {
+                path = Path.GetDirectoryName(subkey.GetValue("DisplayIcon").ToString());
+              }
+            }
+          }
+        }
+      }
+
+      return path;
+    }
+  }
+}