Merge pull request #4 from luispelin/branch_emi_802

Branch emi 802

Author: sinfeadmin

Shared.DFe.Utils/FuncoesXml.cs

@@ -41,19 +41,20 @@
 
 namespace DFe.Utils
 {
-    public static class FuncoesXml
-    {
-
-        // https://github.com/ZeusAutomacao/DFe.NET/issues/610
-        private static readonly Hashtable CacheSerializers = new Hashtable();
-
-        /// <summary>
-        ///     Serializa a classe passada para uma string no form
-        /// </summary>
-        /// <typeparam name="T"></typeparam>
-        /// <param name="objeto"></param>
-        /// <returns></returns>
-        public static string ClasseParaXmlString<T>(T objeto)
+	public static class FuncoesXml
+	{
+
+		// https://github.com/ZeusAutomacao/DFe.NET/issues/610
+		private static readonly object _lock = new object();
+		private static volatile Hashtable _cacheSerializers = new Hashtable();
+
+		/// <summary>
+		///     Serializa a classe passada para uma string no form
+		/// </summary>
+		/// <typeparam name="T"></typeparam>
+		/// <param name="objeto"></param>
+		/// <returns></returns>
+		public static string ClasseParaXmlString<T>(T objeto)
         {
             XElement xml;
             var keyNomeClasseEmUso = typeof(T).FullName;
@@ -224,16 +225,18 @@ public static string ObterNodeDeStringXml(string nomeDoNode, string stringXml)
         // https://github.com/ZeusAutomacao/DFe.NET/issues/610
         private static XmlSerializer BuscarNoCache(string chave, Type type)
         {
-            if (CacheSerializers.Contains(chave))
-            {
-                return (XmlSerializer)CacheSerializers[chave];
-            }
-
-
-            var ser = XmlSerializer.FromTypes(new[] { type })[0];
-            CacheSerializers.Add(chave, ser);
-
-            return ser;
+			lock (_lock)
+			{
+				if (_cacheSerializers.Contains(chave))
+				{
+					return (XmlSerializer)_cacheSerializers[chave];
+				}
+
+				var ser = XmlSerializer.FromTypes(new[] { type })[0];
+				_cacheSerializers.Add(chave, ser);
+
+				return ser;
+			}
         }
     }
 }