❔ Help with designing a functional container object

public readonly struct Outcome<T> {
  private readonly T value;
  private readonly string errorMessage
  public readonly bool IsSuccess

  public static Outcome<T> Of(Func<T> function)
  {
      if (function == null)
          throw new ArgumentNullException(nameof(function));
  
      try
      {
          var value = function();
  
          if (value == null)
              return value == null ? Error("Value cannot be null!") : Success(value);
              // throw new ValueIsNullException("Value cannot be null!");
  
          return Success(value);
      }
      catch (Exception exception)
      {
          return Error(exception);
      }
  }