When you use the ASP. NET Website management tool, the following error occurs. Please return to the previous page and try again ." Solution!

Yesterday, a teacher asked me to say that he is doing ASP. Net, the website management tool is always unavailable! An error occurs when it is opened! "An error is encountered. Please return to the previous page and try again ." He won't be able to do it for a long time. I told him to show it to him last night. I forgot the result! (^_^ Memory is not good !)
I went there early this morning. I looked at it and said that the previous directory can use ASP. NET web applications. ProgramManagement, but no new website can be used. I searched the internet and said it was a permission issue. If I log on using the administrator, this problem does not exist, but I gave the folder full control permission to everyone. I don't need to use it. Is it a path problem? I created a website website1 in the root directory and found that there is no problem. The management tool can run. I think the problem lies in the path. Is the folder name too long? I changed the "C # application example" in his folder to "C # example", but it still won't work if I opened the website !, Do not recognize Chinese characters? No! I changed the folder name to "C #", but the result still failed! In one breath, I changed the folder to asdfg, and the result is OK! It seems that the path is really a problem! Is it true that there is a Chinese character, so it is not possible? I have created a new folder "create folder" and created a website in it. You can use the website management tool !, Wondering! You can also use Chinese! Is it a ghost! I changed "create folder" to "C # create folder". The result management tool is unavailable! It seems that the culprit is "#". I have changed a few folders with special characters. I want to create a website with special characters and the results with "#" will not allow creation, however, some special characters can be created! @, Etc. All right, the problem is solved!
Many of my friends have this problem. Is there a "#" number in your project path? I don't know. At least my problem is caused by "#". I hope it will be useful to everyone!