create a regular expression that determines if a string contains all terms from a given set in any order in csharp

main.cs
string termSet = "(term1|term2|term3)";
string inputString = "This is a string that contains term3, term2, and term1 in any order.";

// Create the regular expression pattern
string pattern = string.Format("^(?=.*{0})", termSet);

// Append a positive lookahead for each term in the termSet
foreach (string term in termSet.Split('|'))
{
    pattern = string.Concat(pattern, "(?=.*\\b", term, "\\b)");
}

// Test if the input string matches the pattern
bool isMatch = Regex.IsMatch(inputString, pattern);

if (isMatch)
{
    Console.WriteLine("The input string contains all terms from the given set.");
}
else
{
    Console.WriteLine("The input string does not contain all terms from the given set.");
}
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