null == foo versus foo == null
62074
Which is more effective: if (null == variable) or if (variable == null)?
1469
Is there a difference between "==" and "is"?
50081
When should I use nil and NULL in Objective-C?
32059
What is \null and when do we need to use it?
151469
What is the difference between null and System.DBNull.Value?
98908
Is it good practice to set variables to null when they are no longer needed?
109876
In the msdn guidance on Equals override, why the cast to object in the null check?
45869
Why null cast a parameter?
53664
What's the difference between equal?, eql?, ===, and ==?
141629
When was the NULL macro not 0?
125549
Does assigning null remove all event handlers from an object?
65694
What is the difference between NULL, '\0' and 0?
110721
Nullable types and the ternary operator: why is `? 10 : null` forbidden?
90598
PHP considers null is equal to zero
94973
Why type "int" is never equal to 'null'?
110077
Is it good practice to NULL a pointer after deleting it?
144361
string.IsNullOrEmpty(string) vs. string.IsNullOrWhiteSpace(string)