Mega Code Archive
0232 Empty string vs null string
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string is a reference type therefore we can assign null to string variable.
using System;
class Sample
{
public static void Main()
{
string s = null;
}
}
Empty string is a string with no characters.
The length of an empty string is 0.
Empty string is not nullstring.
using System;
class Sample
{
public static void Main()
{
string s = "";
Console.WriteLine(s.Length);
}
}
The output:
0
From the code above we can see that the length of a empty string is 0.
We cannot check the Length property on an empty string.
using System;
class Sample
{
public static void Main()
{
string s = null;
Console.WriteLine(s.Length);
}
}
The output:
Unhandled Exception: System.NullReferenceException: Object reference not set to
an instance of an object.
at Sample.Main()
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