Do I need to create my own InvalidArgumentException.. I couldn't find any builtin type in c#

Question

Do I need to create my own InvalidArgumentException.. I couldn't find any built-in types in c#... Is there any library which defines commonly used Exception classes.. Thanks

Answer 1

It's called ArgumentException and it's in the built-in System namespace.

Answer 2

Besides ArgumentException there are also ArgumentNullException and ArgumentOutOfRangeException.

Short summary;

• System.ArgumentException - general exception,
• System.ArgumentNullException - unexpected null value,
• System.ArgumentOutOfRangeException - unexpected value.

Standard usage:

void GetEntity(string currentName)
{
  if (String.IsNullOrEmpty(currentName))
  {
    throw new ArgumentNullException(nameof(currentName));
  }

  //...
}

PS. NotSupportedException also comes in handy (e.g. when the set of arguments would force the method to perform not supported scenario).