fix exception on deleting readonly files

.gitignore

@@ -0,0 +1,4 @@
+bin
+obj
+.vs
+*.suo

torrentwiper/Form1.cs

@@ -46,7 +46,7 @@ private void button1_Click(object sender, EventArgs e)
             TorrentFile torrent = Bencode.DecodeTorrentFile(torrentName);
 
             add_info(torrent.Info["name"].ToString());
-            if(torrent.Info["source"] != null)
+            if (torrent.Info["source"] != null)
                 add_info(torrent.Info["source"].ToString());
             add_info(torrent.Comment);
             add_info(torrent.CreatedBy);
@@ -74,7 +74,11 @@ private void button1_Click(object sender, EventArgs e)
 
         private void button2_Click(object sender, EventArgs e)
         {
-            if (fileNum == 0) return; // .torrent is not loaded
+            if (fileNum == 0) // .torrent is not loaded
+            {
+                MessageBox.Show(".torrent file is not loaded");
+                return;
+            }
 
             using (var fbd = new FolderBrowserDialog())
             {
@@ -116,7 +120,25 @@ private void button3_Click(object sender, EventArgs e)
                 {
                     foreach (string file in listBoxFiles.Items)
                     {
-                        File.Delete(file);
+                    RETRY_DELETE:
+                        try
+                        {
+                            FileInfo fileInfo = new FileInfo(file);
+                            fileInfo.IsReadOnly = false;
+                            fileInfo.Delete();
+                        }
+                        catch (Exception ex)
+                        {
+                            var res = MessageBox.Show(ex.Message, "Error", MessageBoxButtons.AbortRetryIgnore, MessageBoxIcon.Error);
+                            if (res == DialogResult.Abort)
+                            {
+                                break;
+                            }
+                            else if (res == DialogResult.Retry)
+                            {
+                                goto RETRY_DELETE;
+                            }
+                        }
                     }
                     listBoxFiles.Items.Clear();
                     textBox3.Text = "Junk file(s) removed";

torrentwiper/Properties/AssemblyInfo.cs

@@ -32,5 +32,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.0.0.0")]
-[assembly: AssemblyFileVersion("1.0.0.0")]
+[assembly: AssemblyVersion("1.0.1.0")]
+[assembly: AssemblyFileVersion("1.0.1.0")]

torrentwiper/app.config

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.2"/></startup></configuration>

torrentwiper/packages.config

@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="BencodeNET" version="1.3.1" targetFramework="net40-Client" />
+  <package id="BencodeNET" version="1.3.1" targetFramework="net462" />
 </packages>

torrentwiper/torrentwiper.csproj

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">x86</Platform>
@@ -10,8 +10,9 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>torrentwiper</RootNamespace>
     <AssemblyName>torrentwiper</AssemblyName>
-    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
-    <TargetFrameworkProfile>Client</TargetFrameworkProfile>
+    <TargetFrameworkVersion>v4.6.2</TargetFrameworkVersion>
+    <TargetFrameworkProfile>
+    </TargetFrameworkProfile>
     <FileAlignment>512</FileAlignment>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|x86' ">
@@ -23,6 +24,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|x86' ">
     <PlatformTarget>x86</PlatformTarget>
@@ -32,11 +34,11 @@
     <DefineConstants>TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <Prefer32Bit>false</Prefer32Bit>
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="BencodeNET, Version=1.3.1.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>packages\BencodeNET.1.3.1\lib\net40\BencodeNET.dll</HintPath>
-      <Private>True</Private>
+      <HintPath>packages\BencodeNET.1.3.1\lib\net45\BencodeNET.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
@@ -71,6 +73,7 @@
       <DependentUpon>Resources.resx</DependentUpon>
       <DesignTime>True</DesignTime>
     </Compile>
+    <None Include="app.config" />
     <None Include="packages.config" />
     <None Include="Properties\Settings.settings">
       <Generator>SettingsSingleFileGenerator</Generator>