Code aesthetics, unused library cleanup

CreamInstaller/DialogForm.cs

@@ -1,5 +1,4 @@
-using System;
+using System.Drawing;
-using System.Drawing;
 using System.Windows.Forms;
 
 namespace CreamInstaller

CreamInstaller/InstallForm.cs

@@ -101,6 +101,9 @@ namespace CreamInstaller
             }
             UpdateProgress(100);
 
+            if (!Program.IsProgramRunningDialog(this, selection))
+                throw new OperationCanceledException();
+
             UpdateProgress(0);
             UpdateUser("Installing CreamAPI files for " + selection.ProgramName + " . . . ", LogColor.Operation);
             int currentFileCount = 0;
@@ -171,26 +174,8 @@ namespace CreamInstaller
 
                 Program.Cleanup(cancel: false, logout: false);
 
-                bool Check()
+                if (!Program.IsProgramRunningDialog(this, selection))
-                {
+                    throw new OperationCanceledException();
-                    if (selection.ProgramIsRunning)
-                    {
-                        if (new DialogForm(this).Show(Program.ApplicationName, SystemIcons.Error,
-                        $"ERROR: {selection.ProgramName} is currently running!" +
-                        "\n\nPlease close the program/game to continue . . .",
-                        "Retry", "Cancel") == DialogResult.OK)
-                            return Check();
-                    }
-                    else
-                    {
-                        return true;
-                    }
-                    return false;
-                }
-                if (!Check())
-                {
-                    throw new Exception("The operation was canceled.");
-                }
 
                 try
                 {

CreamInstaller/MainForm.cs

@@ -1,8 +1,6 @@
 using System;
-using System.Diagnostics;
 using System.Drawing;
 using System.IO;
-using System.Reflection;
 using System.Threading;
 using System.Windows.Forms;
 using CG.Web.MegaApiClient;

CreamInstaller/Program.cs

@@ -2,6 +2,7 @@ using CG.Web.MegaApiClient;
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.Drawing;
 using System.IO;
 using System.IO.Compression;
 using System.Reflection;
@@ -46,6 +47,23 @@ namespace CreamInstaller
             mutex.Close();
         }
 
+        public static bool IsProgramRunningDialog(Form form, ProgramSelection selection)
+        {
+            if (selection.IsProgramRunning)
+            {
+                if (new DialogForm(form).Show(ApplicationName, SystemIcons.Error,
+                $"ERROR: {selection.ProgramName} is currently running!" +
+                "\n\nPlease close the program/game to continue . . .",
+                "Retry", "Cancel") == DialogResult.OK)
+                    return IsProgramRunningDialog(form, selection);
+            }
+            else
+            {
+                return true;
+            }
+            return false;
+        }
+
         public static bool IsFilePathLocked(this string filePath)
         {
             bool Locked = false;

CreamInstaller/ProgramSelection.cs

@@ -10,7 +10,7 @@ namespace CreamInstaller
         public List<string> SteamApiDllDirectories;
         public INode DownloadNode;
 
-        public bool ProgramIsRunning
+        public bool IsProgramRunning
         {
             get
             {

CreamInstaller/SelectForm.cs

@@ -235,23 +235,7 @@ namespace CreamInstaller
             {
                 foreach (ProgramSelection selection in Program.ProgramSelections)
                 {
-                    bool Check()
+                    if (!Program.IsProgramRunningDialog(this, selection))
-                    {
-                        if (selection.ProgramIsRunning)
-                        {
-                            if (new DialogForm(this).Show(Program.ApplicationName, SystemIcons.Error,
-                            $"ERROR: {selection.ProgramName} is currently running!" +
-                            "\n\nPlease close the program/game to continue . . .",
-                            "Retry", "Cancel") == DialogResult.OK)
-                                return Check();
-                        }
-                        else
-                        {
-                            return true;
-                        }    
-                        return false;
-                    }
-                    if (!Check())
                         return;
                 }