System.NullReferenceException: Object reference not set to an instance of an object in C#
289
What is a NullReferenceException, and how do I fix it?
110012
DmlException:SELF_REFERENCE_FROM_TRIGGER
147251
How do I fix the error where I cannot make a static reference to a non-static input field?
64332
avoiding null reference exceptions
38664
Keep getting this error: System.QueryException: List has no rows for assignment to SObject
121471
Reference type still needs pass by ref?
132361
Find references to the object in runtime
96046
Static fields on a null reference in Java
87728
ArgumentNullException or NullReferenceException from extension method?
85201
"Cannot create an instance of the abstract class or interface" C# error message
59517
FATAL_ERROR|System.QueryException: List has no rows for assignment to SObject
68222
Reference to undeclared entity exception while working with XML
125400
copy object as a reference
92446
C#: How to pass null to a function expecting a ref?
107423
After ExecuteScalar: Object reference not set etc
138687
How to fix "System.QueryException: List has more than 1 row for assignment to SObject"
48603
When to use ref and when it is not necessary in C#