C # How to obtain the project path

1.asp.net webform: Use "request. physicalapplicationpath" to obtain the physical path of the virtual directory of the site, and finally include "\"; 2.c# for winform
A: "application. startuppath": Get the current application ProgramPath of the Directory, excluding "\";
B: "application. executablepath": obtains the path of the current application file, including the file name;
C: "appdomain. currentdomain. basedirectory": gets the path of the directory where the current application is located, and finally contains "\";
D: "system. Threading. thread. getdomain (). basedirectory": gets the path of the directory where the current application is located, and finally contains "\";
E: "environment. currentdirectory": gets the path of the current application and does not contain "\".
F: "system. io. directory. getcurrentdirectory: Get the path of the current application, excluding "\"; 3.c# use "appdomain" for Windows service. currentdomain. basedirectory or system. threading. thread. getdomain (). basedirectory ";
Use "environment. currentdirectory" and "system. Io. Directory. getcurrentdirectory" to get the path of the "System32" Directory;
If you want to use "application. startuppath or application. executablepath, You need to manually add the "system. windows. forms. DLL. windows. forms "declares this reference;