static public void UpdateUniversity(ref Dictionary <int, University> ListOfUniversities)
{
string NewName;
Console.WriteLine("Please enter the University's ID․․");
var UIDasStr = Console.ReadLine();
int UID;
while (!int.TryParse(UIDasStr, out UID))
{
Console.WriteLine("This is not a number! Try again..");
UIDasStr = Console.ReadLine();
}
if (ListOfUniversities.ContainsKey(UID))
{
Console.WriteLine("Please enter the new University's name..");
NewName = Console.ReadLine();
bool allLetters;
while (!(allLetters = NewName.All(c => Char.IsLetter(c))) || !(NewName.IsUpper()))
{
Console.WriteLine("Invalid name format! Try again..");
NewName = Console.ReadLine();
}
ListOfUniversities[UID].Name = NewName;
}
else
{
Console.WriteLine("There is no University on this ID!");
}
}