Add Custom Column Choice to sharepoint List

Introduction

this code help you create custom column on List.Create a custom field call Choice Year years and multiple choice and add to List.

Codesnippet

using (SPSite site = new SPSite ("Site Path"))
(
using (SPWeb web = site.OpenWeb ())
(
/ / Validate Field is exist 
if (! web.Lists ["Shared Documents"]. Fields.ContainsField ("Year")) 
( 

SPField customField; 
/ / Creating a new field 
MyField web.Fields.CreateNewField = (SPFieldType.Choice.ToString (), "Year");
/ / Required the Field 
MyField.Required = true;
Web.Lists SPList list = ["Shared Documents"];
SPField Year = MyField;
list.Fields.Add (Year);

SPFieldChoice YearField = (SPFieldChoice) list.Fields ["Year"];
for (int i = 1990; i <2021; i + +)
(
YearField.Choices.Add (i.ToString ()); 
)
YearField.DefaultValue DateTime.Now.Date.Year.ToString = ();
YearField.Update (); 
)
)
)

Hope you like.