first commit

HelpersXml/XmlHelper.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml.Linq;
+
+namespace EFCDesk.HelpersXml
+{
+    public static class XmlHelper
+    {
+        public static string Value(XElement? parent, XName elementName)
+            => parent?.Element(elementName)?.Value?.Trim() ?? string.Empty;
+
+        public static string Value(XElement? parent, string elementName)
+            => parent?.Element(elementName)?.Value?.Trim() ?? string.Empty;
+
+        public static decimal? Decimal(XElement parent, XName elementName)
+        {
+            var value = Value(parent, elementName);
+            if (decimal.TryParse(value, out var result))
+                return result;
+
+            return null;
+        }
+
+        public static List<XElement> Elements(XElement? parent, XName elementName)
+           => parent?.Elements(elementName)?.ToList() ?? new List<XElement>();
+    }
+}

HelpersXml/XmlNamespaces.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Xml.Linq;
+
+namespace EFCDesk.HelpersXml
+{
+    public sealed class XmlNamespaces
+    {
+        public readonly XNamespace S =
+            "http://schemas.xmlsoap.org/soap/envelope/";
+
+        public readonly XNamespace ns2 =
+            "http://www.ventanillaunica.gob.mx/pedimentos/ws/oxml/consultarpedimentocompleto";
+
+        public readonly XNamespace ns3 =
+            "http://www.ventanillaunica.gob.mx/common/ws/oxml/respuesta";
+
+        public readonly XNamespace comunes =
+            "http://www.ventanillaunica.gob.mx/pedimentos/ws/oxml/comunes";
+    }
+}