How to add new values to a picklist from apex code
107041
How can I add a new value to a picklist using APEX?
16988
How do I use the Tooling API to create a new Apex Trigger?
28253
Get lists of dependent picklist options in Apex
86775
Using  on a List doesn't update model values
25311
Invalid selectOptions found. Use SelectOption type in Apex
43905
picklist value not recognized in the test
9866
How do I get started working with JSON in Apex?
2775
Create static resource with apex code
112204
how to get a picklist all values in apex controller
53752
Populating a list of integers in .NET
75664
how to pass value from visual force page (InputField) to controller?
25822
Add new item in existing array in c#.net
37683
Picklist population from design resource in lightning
2741
How to edit Parameters for an Object after it is created?
67560
How to bind LINQ data to dropdownlist
113179
How to make a new List in Java
139879
Validation Rule on picklist under opportunities