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You must call ClientContext.ExecuteQuery() to persist any changes to the server.

When modifying a Field object you need to call ClientContext.ExecuteQuery() in order to persist the changes to the server.

CheckId SPC019021
TypeName ExecuteQueryAfterModifyingFieldObject
Severity Warning
Type Assembly

Bad Practice

using (var context = new ClientContext("http://yoursite"))
{
    List list = context.Web.Lists.GetByTitle("Announcements");

    Field field = list.Fields.AddFieldAsXml("<field displayname='MyField2' type='Number' />",
    true,
    AddFieldOptions.DefaultValue);

    FieldNumber fldNumber = context.CastTo<FieldNumber>(field);
    fldNumber.MaximumValue = 100;
    fldNumber.MinimumValue = 35;
    fldNumber.Update();
}


Good Practice
using (var context = new ClientContext("http://yoursite"))
{
    List list = context.Web.Lists.GetByTitle("Announcements");

    Field field = list.Fields.AddFieldAsXml("<field displayname='MyField2' type='Number' />",
    true,
    AddFieldOptions.DefaultValue);

    FieldNumber fldNumber = context.CastTo<FieldNumber>(field);
    fldNumber.MaximumValue = 100;
    fldNumber.MinimumValue = 35;
    fldNumber.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", "SPC019021:ExecuteQueryAfterModifyingFieldObject", Justification = "Provide reason for suppression here")]
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