The original proposal references all of Python's context manager, Java's try-with-resource, and C#'s using statement and declaration: https://github.com/tc39/proposal-explicit-resource-managemen...

    public void AMethod() {
        //some code
        using var stream = thing.GetStream();
        //some other code
        var x = thing.ReadToEnd();
        //file will be automatically disposed as this is the last time file is used
        //some more code not using file
    } //any error means file will be disposed if initialized

You can even nest them like this:

    using var conn = new SqlConnection(connString);
    using var cmd = new SqlCommand(cmd);
    conn.Open();
    cmd.ExecuteSql();