Deploying Custom Master Page in SharePoint

Using Visual Studio I am deploying the master page am creating an Empty Project, in that Feature I am adding a new Feature Scope I am selecting as” Site “and adding the Event Receiver.

I am adding the module it is used to deploy files to the SharePoint Environment,

In That Module I am having sample.txt I am changing it to CustomMaster.master

Finally my solution is looks as shown below.

In Feature1.EventReceiver.cs I am adding the Below code

public override void FeatureActivated(SPFeatureReceiverProperties properties)

        {

            SPSite siteCollection = (SPSite)properties.Feature.Parent;

           SPWeb web = siteCollection.RootWeb;

            Uri masteruri = new Uri(web.Url+"/_catalogs/masterpage/CustomMaster.master");

            web.MasterUrl = masteruri.AbsolutePath;

            web.CustomMasterUrl = masteruri.AbsolutePath;

            web.Update();

        }

        public override void FeatureDeactivating(SPFeatureReceiverProperties properties)

        {

            SPSite siteCollection = (SPSite)properties.Feature.Parent;

            SPWeb web = siteCollection.RootWeb;

            Uri masteruri = new Uri(web.Url + "/_catalogs/masterpage/Seattle.master");

            web.MasterUrl = masteruri.AbsolutePath;

            web.CustomMasterUrl = masteruri.AbsolutePath;

            web.Update();

        }

Module1 in Element.xml I am adding the below lines

<?xml version="1.0" encoding="utf-8"?>

<Elements xmlns="http://schemas.microsoft.com/sharepoint/">

  <Module Name="Module1" List="116" Url="_catalogs/masterpage">

    <File Path="Module1\CustomMaster.master" Url="CustomMaster.master" Type="GhostableInLibrary" IgnoreIfAlreadyExists="TRUE" />

  </Module>

</Elements>

Once completed all the steps deploy the solution in visual studio

It will be changed as our custom master as shown below.