How to create a new group for the term store

Steps

1. Open Visual Studio in your system.
2. Select Console Applciation template and give as name.
3. Add a Microsoft.Cleint Assembly refrence file in right side refrence tab in visual studio.
4. Replace Program.cs with the source code. 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.SharePoint.Client;
using Microsoft.SharePoint.Client.Taxonomy;
namespace CSOMCodeSamples
{
    class Program
    {
        static void Main(string[] args)
        {

            ClientContext clientContext = new ClientContext("http://gauti.sharepoint.com/sp/gvr");
            // Get the TaxonomySession
            TaxonomySession taxonomySession = TaxonomySession.GetTaxonomySession(clientContext);
            // Get the term store by name
            TermStore termStore = taxonomySession.TermStores.GetByName("GVR");
            // Create a new guid for group
            Guid guid = Guid.NewGuid();
            // Create a new group
            TermGroup termGroup = termStore.CreateGroup("NewGroup", guid);
            // Commit all the changes
            termStore.CommitAll();
            // Execute the query to the server
            clientContext.ExecuteQuery();
        }
    }
}

Hit F5 and Check  the output...

 

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