Check if string have uppercase, lowercase and number

Question

I want to check if my string have Uppercase & LowerCase & Number

string myString = "Hello123";

if (myString haveUppercase && myString haveLowerCase && myString haveNumber)
{
    this.hide();
}
else
{
    MessageBox.Show("Error!");
}

Answer 1

You can use char's methods with LINQ:

if (myString.Any(char.IsUpper) &&
    myString.Any(char.IsLower) &&
    myString.Any(char.IsDigit))

Answer 2

if (myString.Any(ch => char.IsUpper(ch) &&
    myString.Any(ch => char.IsLower(ch) &&
    myString.Any(ch => char.IsDigit(ch))
    { 
      this.hide();
    }
    else
    {
        MessageBox.Show("Error!");
    }