Sharepoint CSOM adds a field to a SharePoint list

// Starting with ClientContext, the constructor requires a URL to the 
// server running SharePoint. 
ClientContext context = new ClientContext("http://SiteUrl"); 

SP.List list = context.Web.Lists.GetByTitle("Announcements"); 

SP.Field field = list.Fields.AddFieldAsXml("<Field DisplayName='MyField2' Type='Number' />", 
                                           true, 
                                           AddFieldOptions.DefaultValue); 
SP.FieldNumber fldNumber = context.CastTo<FieldNumber>(field); 
fldNumber.MaximumValue = 100; 
fldNumber.MinimumValue = 35; 
fldNumber.Update(); 

context.ExecuteQuery(); 

Sharepoint CSOM Delete a SharePoint list

// Starting with ClientContext, the constructor requires a URL to the 
// server running SharePoint. 
ClientContext context = new ClientContext("http://SiteUrl"); 

// The SharePoint web at the URL.
Web web = context.Web; 

List list = web.Lists.GetByTitle("My List"); 
list.DeleteObject(); 

context.ExecuteQuery();  

Sharepoint CSOM Create and update a SharePoint list

// Starting with ClientContext, the constructor requires a URL to the 
// server running SharePoint. 
ClientContext context = new ClientContext("http://SiteUrl"); 

// The SharePoint web at the URL.
Web web = context.Web; 

ListCreationInformation creationInfo = new ListCreationInformation(); 
creationInfo.Title = "My List"; 
creationInfo.TemplateType = (int)ListTemplateType.Announcements; 
List list = web.Lists.Add(creationInfo); 
list.Description = "New Description"; 

list.Update(); 
context.ExecuteQuery(); 

Sharepoint CSOM LoadQuery method to store the return value in another collection, rather than use the web.Lists property

// Starting with ClientContext, the constructor requires a URL to the 
// server running SharePoint. 
ClientContext context = new ClientContext("http://SiteUrl"); 

// The SharePoint web at the URL.
Web web = context.Web; 

// Retrieve all lists from the server, and put the return value in another 
// collection instead of the web.Lists. 
IEnumerable<SP.List> result = context.LoadQuery(web.Lists.Include( // For each list, retrieve Title and Id.
                                                                   list => list.Title, 
                                                                   list => list.Id)); 

// Execute query. 
context.ExecuteQuery(); 

// Enumerate the result. 
foreach (List list in web.Lists) 
{ 
    label1.Text = label1.Text + ", " + list.Title; 
} 

Sharepoint CSOM Retrieve all SharePoint lists in a web

// Starting with ClientContext, the constructor requires a URL to the 
// server running SharePoint. 
ClientContext context = new ClientContext("http://SiteUrl"); 

// The SharePoint web at the URL.
Web web = context.Web; 

// Retrieve all lists from the server. 
context.Load(web.Lists, 
             lists => lists.Include(list => list.Title, // For each list, retrieve Title and Id. 
                                    list => list.Id)); 

// Execute query. 
context.ExecuteQuery(); 

// Enumerate the web.Lists. 
foreach (List list in web.Lists) 
{ 
    label1.Text = label1.Text + ", " + list.Title; 
} 

Sharepoint CSOM Create a new SharePoint website

// Starting with ClientContext, the constructor requires a URL to the 
// server running SharePoint. 
ClientContext context = new ClientContext("http://SiteUrl"); 

WebCreationInformation creation = new WebCreationInformation(); 
creation.Url = "web1"; 
creation.Title = "Hello web1"; 
Web newWeb = context.Web.Webs.Add(creation); 

// Retrieve the new web information. 
context.Load(newWeb, w => w.Title); 
context.ExecuteQuery(); 

label1.Text = newWeb.Title; 

Sharepoint CSOM Write to website's properties

// Starting with ClientContext, the constructor requires a URL to the 
// server running SharePoint. 
ClientContext context = new ClientContext("http://SiteUrl"); 

// The SharePoint web at the URL.
Web web = context.Web; 

web.Title = "New Title"; 
web.Description = "New Description"; 

// Note that the web.Update() does not trigger a request to the server
// because the client library until ExecuteQuery() is called. 
web.Update(); 

// Execute the query to server.
context.ExecuteQuery();