C# null check

Null coalescing operator c#

//the null coalescing operator for c# is ??
int? x = null;
int y = 9;
return x ?? y; 
//Will return the value of x if x is not null else return y

Null check syntax c#

//Check if an object is null before calling a function using the ? operator.
//The ? operator is syntactic suger for the if block below:

//Using the ? operator
myObject?.MyFunc();

//Using an if block.
if (myObject != null)
{
  myObject.MyFunc();
}

C# null conditional

//Return stirng representation of nullable DateTime
DateTime? x = null;
return x.HasValue == true ? x.Value.ToString() : "No Date";

C# null check

if (name is null)
  {
    throw new ArgumentNullException(nameof(name));
  }

Source: thomasclaudiushuber.com

C# null check

public static int CountNumberOfSInName(string name)
{
  if (name == null)
  {
    throw new ArgumentNullException(nameof(name));
  }

  return name.Count(c => char.ToLower(c).Equals('s'));
}

Source: thomasclaudiushuber.com

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