Is the double buffering, what is a "double buffering"? Its basic principle is: to create a virtual canvas in memory, and then will all need to draw the graphics first painting in the "virtual canvas", finally, in a one-off the entire piece of canvas painting real form.

double buffering
................\双缓存技术 实验
................\................\Form1.Designer.cs
................\................\Form1.cs
................\................\Form1.resx
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................\................\Properties
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................\................\..........\Settings.Designer.cs
................\................\..........\Settings.settings
................\................\bin
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................\................\...\.....\双缓存技术 实验.exe
................\................\...\.....\双缓存技术 实验.pdb
................\................\...\.....\双缓存技术 实验.vshost.exe
................\................\...\.....\双缓存技术 实验.vshost.exe.manifest
................\................\...\Release
................\................\obj
................\................\...\x86
................\................\...\...\Debug
................\................\...\...\.....\DesignTimeResolveAssemblyReferences.cache
................\................\...\...\.....\DesignTimeResolveAssemblyReferencesInput.cache
................\................\...\...\.....\TempPE
................\................\...\...\.....\双缓存技术 实验.csproj.FileListAbsolute.txt
................\................\...\...\.....\双缓存技术 实验.csproj.GenerateResource.Cache
................\................\...\...\.....\双缓存技术 实验.exe
................\................\...\...\.....\双缓存技术 实验.pdb
................\................\...\...\.....\双缓存技术__实验.Form1.resources
................\................\...\...\.....\双缓存技术__实验.Properties.Resources.resources
................\................\双缓存技术 实验.csproj
................\双缓存技术 实验.sln
................\双缓存技术 实验.suo

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