WPF实现断点续传下载

[{"title":"（ 44 个子文件 193KB ） WPF实现断点续传下载","children":[{"title":"WPFDownloadFile","children":[{"title":"WPFDownloadFile.sln <span style='color:#111;'> 1014B </span>","children":null,"spread":false},{"title":"WPFDownloadFile","children":[{"title":"WPFDownloadFile.csproj <span style='color:#111;'> 4.63KB </span>","children":null,"spread":false},{"title":"1.ico <span style='color:#111;'> 281.19KB </span>","children":null,"spread":false},{"title":"App.xaml.cs <span style='color:#111;'> 342B </span>","children":null,"spread":false},{"title":"MainWindow.xaml.cs <span style='color:#111;'> 7.61KB </span>","children":null,"spread":false},{"title":"Image","children":[{"title":"Explorer.png <span style='color:#111;'> 14.29KB </span>","children":null,"spread":false}],"spread":true},{"title":"MainWindow.xaml <span style='color:#111;'> 2.33KB </span>","children":null,"spread":false},{"title":"Properties","children":[{"title":"Settings.settings <span style='color:#111;'> 201B 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<span style='color:#111;'> 180B </span>","children":null,"spread":false},{"title":"App.g.cs <span style='color:#111;'> 2.27KB </span>","children":null,"spread":false},{"title":"MainWindow.g.i.cs <span style='color:#111;'> 5.41KB </span>","children":null,"spread":false}],"spread":false}],"spread":true},{"title":"bin","children":[{"title":"Debug","children":[{"title":"WPFDownloadFile.vshost.exe.manifest <span style='color:#111;'> 490B </span>","children":null,"spread":false},{"title":"WPFDownloadFile.pdb <span style='color:#111;'> 31.50KB </span>","children":null,"spread":false},{"title":"SysSet.ini <span style='color:#111;'> 32B </span>","children":null,"spread":false},{"title":"WPFDownloadFile.exe <span style='color:#111;'> 590.00KB </span>","children":null,"spread":false},{"title":"断点续传demo.rar <span style='color:#111;'> 31.15KB </span>","children":null,"spread":false},{"title":"WPFDownloadFile.vshost.exe.config <span style='color:#111;'> 184B 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