C#判断文件及文件夹是否存在并创建

[{"title":"（ 21 个子文件 38KB ） C#判断文件及文件夹是否存在并创建","children":[{"title":"判断文件及文件夹是否存在并创建","children":[{"title":"Winapp_CreateFile","children":[{"title":"Winapp_CreateFile","children":[{"title":"Form1.cs <span style='color:#111;'> 2.22KB </span>","children":null,"spread":false},{"title":"bin","children":[{"title":"Debug","children":[{"title":"Winapp_CreateFile.vshost.exe <span style='color:#111;'> 5.50KB </span>","children":null,"spread":false},{"title":"Winapp_CreateFile.pdb <span style='color:#111;'> 27.50KB </span>","children":null,"spread":false},{"title":"Winapp_CreateFile.exe <span style='color:#111;'> 24.00KB </span>","children":null,"spread":false}],"spread":true}],"spread":true},{"title":"obj","children":[{"title":"Debug","children":[{"title":"Winapp_CreateFile.Form1.resources <span style='color:#111;'> 180B </span>","children":null,"spread":false},{"title":"Winapp_CreateFile.csproj.GenerateResource.Cache <span style='color:#111;'> 842B </span>","children":null,"spread":false},{"title":"Winapp_CreateFile.pdb <span style='color:#111;'> 27.50KB </span>","children":null,"spread":false},{"title":"Winapp_CreateFile.exe <span style='color:#111;'> 24.00KB </span>","children":null,"spread":false},{"title":"TempPE","children":null,"spread":false},{"title":"Winapp_CreateFile.Properties.Resources.resources <span style='color:#111;'> 180B </span>","children":null,"spread":false}],"spread":true},{"title":"Winapp_CreateFile.csproj.FileList.txt <span style='color:#111;'> 338B </span>","children":null,"spread":false}],"spread":true},{"title":"Properties","children":[{"title":"Resources.Designer.cs <span style='color:#111;'> 2.82KB </span>","children":null,"spread":false},{"title":"Settings.settings <span style='color:#111;'> 249B </span>","children":null,"spread":false},{"title":"Resources.resx <span style='color:#111;'> 5.48KB </span>","children":null,"spread":false},{"title":"Settings.Designer.cs <span style='color:#111;'> 1.07KB </span>","children":null,"spread":false},{"title":"AssemblyInfo.cs <span style='color:#111;'> 1.18KB </span>","children":null,"spread":false}],"spread":true},{"title":"Program.cs <span style='color:#111;'> 476B </span>","children":null,"spread":false},{"title":"Winapp_CreateFile.csproj <span style='color:#111;'> 3.17KB </span>","children":null,"spread":false},{"title":"Form1.Designer.cs <span style='color:#111;'> 6.95KB </span>","children":null,"spread":false},{"title":"Form1.resx <span style='color:#111;'> 5.68KB </span>","children":null,"spread":false}],"spread":true},{"title":"Winapp_CreateFile.sln <span style='color:#111;'> 940B </span>","children":null,"spread":false},{"title":"Winapp_CreateFile.suo <span style='color:#111;'> 18.00KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}],"spread":true}]