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You must call Update() to persist any changes to the Web object.

When modifying the Web object you need to call Web.Update() in order to persist the changes to the object.

CheckId SPC019007
TypeName UpdateAfterModifyingWebObject
Severity Warning
Type Assembly

Bad Practice

using (var context = new ClientContext("http://yoursite"))
{
    Web web = context.Web;
    web.Title = "My New Title";
    web.Description = "My New Title";
    context.ExecuteQuery()
}


Good Practice
using (var context = new ClientContext("http://yoursite"))
{
    Web web = context.Web;
    web.Title = "My New Title";
    web.Description = "My New Description";
    web.Update();
    context.ExecuteQuery();
}

To suppress this violation in managed code add the following attribute to the method which contains the instruction (available since SPCAF version v5.2). Learn more about SuppressMessage here.

// Important: Ensure to have #define CODE_ANALYSIS at the beginning of your .cs file
[SuppressMessage("SPCAF.Rules.ManagedCSOM.CSOMCorrectnessGroup", "SPC019007:UpdateAfterModifyingWebObject", Justification = "Provide reason for suppression here")]
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