handling null and string.empty using ?? operator in C#

Question

I want to handle "" and null while assigning value to the property of the class.

So how can i handle the same. Below is my example which works for null. But also want to handle empty string

 Id = characater.Id ?? System.Guid.NewGuid().ToString(),

Answer 1

Use string.IsNullOrEmpty along with the ?: Operator.

Id = string.IsNullOrEmpty(characater.Id) 
  ? System.Guid.NewGuid().ToString() 
  : characater.Id;

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If you you also want to check for white space characters line spaces, line breaks, tabs, you can use String.IsNullOrWhiteSpace instead.