c#随机抽奖小程序，完整代码

F:\vs_project\WindowsFormsApp1\WindowsFormsApp1\obj\Debug\WindowsFormsApp1.csprojAssemblyReference.cache F:\vs_project\WindowsFormsApp1\WindowsFormsApp1\obj\Debug\WindowsFormsApp1.Form1.resources F:\vs_project\WindowsFormsApp1\WindowsFormsApp1\obj\Debug\WindowsFormsApp1.Properties.Resources.resources F:\vs_project\WindowsFormsApp1\WindowsFormsApp1\obj\Debug\WindowsFormsApp1.csproj.GenerateResource.cache F:\vs_project\WindowsFormsApp1\WindowsFormsApp1\obj\Debug\WindowsFormsApp1.csproj.CoreCompileInputs.cache F:\vs_project\WindowsFormsApp1\WindowsFormsApp1\bin\Debug\WindowsFormsApp1.exe.config F:\vs_project\WindowsFormsApp1\WindowsFormsApp1\bin\Debug\WindowsFormsApp1.exe F:\vs_project\WindowsFormsApp1\WindowsFormsApp1\bin\Debug\WindowsFormsApp1.pdb F:\vs_project\WindowsFormsApp1\WindowsFormsApp1\obj\Debug\WindowsFormsApp1.exe F:\vs_project\WindowsFormsApp1\WindowsFormsApp1\obj\Debug\WindowsFormsApp1.pdb