fixed XMLToObject service to return correct XML part

src/TallyConnector/Services/XMLToObject.cs

@@ -68,6 +68,7 @@ public static T GetObjfromXml<T>(string Xml, XmlAttributeOverrides? attrOverride
                     IEnumerable<string> values;
                     if (!string.IsNullOrEmpty(RootElement))
                     {
+                        RootElement = $"<{RootElement} ";
                         var beforeLines = Splittedstrings.Take(StartIndex).Reverse();
                         int linenum = StartIndex;
                         foreach (string line in beforeLines)

src/Tests/Services/XMLToObjectServiceTests.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using TallyConnector.Core.Models;
+
+namespace Tests.Services;
+public class XMLToObjectServiceTests
+{
+    [Test]
+    public void TestXMLToObject()
+    {
+        string xml = File.ReadAllText("C:\\Users\\talla\\Downloads\\Untitled-1.xml");
+        XmlAttributeOverrides XMLAttributeOverrides = new();
+        XmlAttributes attrs = new();
+        attrs.XmlElements.Add(new("VOUCHER"));
+        XMLAttributeOverrides.Add(typeof(Colllection<Voucher>), "Objects", attrs);
+        var voucher = XMLToObject.GetObjfromXml<Envelope<Voucher>>(xml, XMLAttributeOverrides);
+    }
+}