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`
68713
Why is it Valid to Concatenate Null Strings but not to Call "null.ToString()"?
114349
What is a null-terminated string?
28203
System.QueryException: List has no rows for assignment to SObject
94938
.NET : How do you get the Type of a null object?
156694
Mapping empty strings to NULL in NHibernate
87189
System.NullPointerException
108336
Nullable Object must have a value #2
120071
Checking for a null int value from a Java ResultSet
83354
Nullable types: better way to check for null or zero in c#
89055
Possible to use ?? (the coalesce operator) with DBNull?
127452
Why is typeof null "object"?
93966
The ViewData item that has the key 'XXX' is of type 'System.Int32' but must be of type 'IEnumerable'
25960
How to easily convert a DbDataReader object into something useful?
140738
Does setting Java objects to null do anything anymore?
10316
IEnumerable.Cast won't work even if an explicit cast operator is defined?
75428
LINQ to Entities does not recognize the method 'System.String ToString()' method, and this method cannot be translated into a store expression