fix: 不使用磁盘缓存

Plain Craft Launcher 2/Modules/Base/MyBitmap.vb

@@ -64,13 +64,14 @@ Public Class MyBitmap
                     BitmapCache.Add(FilePathOrResourceName, Pic)
                 End If
             Else
+                Dim InputStream As Stream
                 If FilePathOrResourceName.StartsWithF("http") Then '在线图片（这里判断 https:\\ 或 http:\\ 会出问题）
-                    Dim tempFile = PathTemp & "Cache\MyImage\" & GetHash(FilePathOrResourceName)
-                    NetDownload(FilePathOrResourceName, tempFile, True)
-                    FilePathOrResourceName = tempFile
+                    Dim Client = New Net.WebClient()
+                    InputStream = New MemoryStream(Client.DownloadData(FilePathOrResourceName))
+                Else
+                    InputStream = New MemoryStream(File.ReadAllBytes(FilePathOrResourceName))
                 End If
                 '使用这种自己接管 FileStream 的方法加载才能解除文件占用
-                Using InputStream As New FileStream(FilePathOrResourceName, FileMode.Open)
                 '判断是否为 WebP 文件头
                 Dim Header(1) As Byte
                 InputStream.Read(Header, 0, 2)
@@ -85,7 +86,6 @@ Public Class MyBitmap
                 Else
                     Pic = New System.Drawing.Bitmap(InputStream)
                 End If
-                End Using
             End If
         Catch ex As Exception
             Pic = My.Application.TryFindResource(FilePathOrResourceName)