Insert, update, delete, and order global option set options

How to Modify value of optionset by code C#?

DeleteOptionValueRequest deleteOptionValueRequest =

    new DeleteOptionValueRequest
{
    OptionSetName = _globalOptionSetName,
    Value = _insertedOptionValue
};
// Execute the request.
svc.Execute(deleteOptionValueRequest);


Another method
UpdateOptionValueRequest updateOptionValueRequest =
    new UpdateOptionValueRequest
    {
        OptionSetName = _globalOptionSetName,
        // Update the second option value.
        Value = optionList[1].Value.Value,
        Label = new Label("Updated Option 1", _languageCode)
    };

_serviceProxy.Execute(updateOptionValueRequest);