Unable to cast object of type System.DBNull to type System.String
92187
Unable to cast object of type 'System.DBNull' to type 'System.String`
138823
Why cast null to Object?
56858
Possible to overload null-coalescing operator?
69072
Using LINQ to find item in a List but get "Value cannot be null. Parameter name: source"
59517
FATAL_ERROR|System.QueryException: List has no rows for assignment to SObject
81161
"Unable to cast object of type 'System.Byte[]' to type 'System.IConvertible'." error in Photo: why and how do I fix it?
149666
Why can't a null-reference exception name the object that has a null reference?
41898
Nullable integer in .NET
89755
Why is "throw null" not creating a compilation error in Java?
78238
Nullable type is not a nullable type?
114605
How to create a DbDataAdapter given a DbCommand or DbConnection?
83354
Nullable types: better way to check for null or zero in c#
22992
How to specify null value in MS Access through the JDBC-ODBC bridge?
124080
How does the assignment of the null literal to a System.Nullable type get handled by .Net (C#)?
75247
Convert string to nullable type (int, double, etc...)
73034
StringBuilder append() and null values
33613
Why is this trigger finding a null value despite the field being populated?