public static void ValidateNotSupplied(string s, ClientExDetail detail)
{
if (!string.IsNullOrWhiteSpace(s))
{
throw detail.Instance();
}
}
internal static string ValidateMustMatchIfBothSupplied(string s1, string s2, ClientExDetail detail)
{
// s1 | s2 || result
// ---- | ---- || --------------
// null | null || valid, null s2
// null | y || valid, y s2
// x | null || valid, x s1
// x | x || valid, x s1
// x | y || invalid
s1 = EmptyAsNull(s1);
s2 = EmptyAsNull(s2);
if (s1 == null)
{
return(s2); // s2 can be either null or y
}
// x / null or x / x
if (s2 == null || s1.Equals(s2))
{
return(s1);
}
throw detail.Instance();
}