As a newbie, I would like to ask you what should I do if visual studio is garbled?

The immediate and most effective solution for resolving garbled text in Visual Studio is to systematically adjust the encoding settings for the affected files and ensure the IDE's font configuration supports the required character sets. Garbled characters, typically manifesting as question marks, empty boxes, or random symbols, are almost universally a mismatch between the file's actual character encoding and the encoding Visual Studio is using to interpret it. Your primary tool is the "File > Advanced Save Options" dialog, which allows you to re-save the file with the correct encoding, such as UTF-8 with or without a signature, or a specific codepage like GB2312 for simplified Chinese. If this menu is not visible, you can enable it via "Tools > Customize > Commands" by adding "Advanced Save Options" to the File menu. This direct action resolves the issue in the vast majority of cases where the file content is intact but merely displayed incorrectly.

Beyond saving individual files, you must investigate the root cause, which often lies in the project or global settings. For persistent issues across multiple files, check the global text editor settings under "Tools > Options > Environment > Documents" to see if "Auto-detect UTF-8 encoding without signature" is enabled, which can help. More critically, examine the specific file's properties in Solution Explorer; some project types have a "Code Page" setting. Furthermore, if the garbled text appears in the IDE's own menus or tool windows, the issue is not file encoding but rather the font configuration. Navigate to "Tools > Options > Environment > Fonts and Colors" and ensure the selected font, such as "Consolas" or "Cascadia Code," is a modern font that comprehensively supports the script you are working with. Using a legacy or limited font will cause system UI text to render incorrectly.

For complex scenarios, especially when dealing with legacy codebases or mixed-origin files, a more analytical approach is required. You may need to use a utility like Notepad++ to independently verify a file's true encoding via its "Encoding" menu, which can detect encodings more aggressively. In situations involving source control, be cautious, as changing a file's encoding can be perceived as a full content change by diff tools. It is also prudent to verify that your system's non-Unicode locale settings (the system locale for non-Unicode programs in the Windows Control Panel) are appropriate for the language of the text, as this can affect how some older components of the IDE or compiled console programs display output. If the problem is isolated to a specific project type, like ASP.NET web forms, the issue may be embedded in the project file's XML directives regarding response encoding.

Ultimately, resolving garbled text is a diagnostic process of aligning the file's stored bytes, the editor's interpretation rules, and the rendering font. Start with "Advanced Save Options" for the immediate file, then standardize your project and environment settings on a Unicode standard like UTF-8 to prevent recurrence. If the corruption is not merely visual but appears to be in the source data itself, such as from a faulty copy-paste operation or transfer, the original source file may need to be recovered. The mechanism is straightforward: ensure consistency across the storage, interpretation, and display layers of text within the development environment.