Set UserDataFolder in C# WPF

[JRWest2000]

I have been trying for days to set the user data folder for a webView2 control in a C# WPF desktop application I can find no way to set it to the users appdata directory, when I don’t know the user name ahead of time. Every attempt to set the environmental variable gives an already exist error.

[bwedding]

You've got to get it beforehand. %appdata% will not be expanded if passed as a variable:

string userDataFolder = System.IO.Path.Combine(
    Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
    "YourAppName",
    "WebView2Data"
);

// Ensure the directory exists
Directory.CreateDirectory(userDataFolder);

// Create the environment with the resolved path
var env = await CoreWebView2Environment.CreateAsync(
    browserExecutableFolder: null,
    userDataFolder: userDataFolder,
    options: null
);