Why is that an Optional member variable in a class has a default value of null?
49
What is a NullPointerException, and how do I fix it?
12827
Are nullable types reference types?
94973
Why type "int" is never equal to 'null'?
75987
How do you use the non-default constructor for a member?
93075
Why are global and static variables initialized to their default values?
19902
Shortcut for "null if object is null, or object.member if object is not null"
17256
Two constructors, which is default?
122797
Why are C# 4 optional parameters defined on interface not enforced on implementing class?
81624
Is returning null bad design?
115308
Setting default values (conditional assignment)
153698
Is there an easy way to tell if a class/struct has no data members?
134689
Setting an object to null vs Dispose()
599
Is Java "pass-by-reference" or "pass-by-value"?
64884
Why `null >= 0 && null <= 0` but not `null == 0`?
134386
Should you ever use protected member variables?
108638
Pointer of structure initialization to NULL
8283
Why does null reference print as "null"