refactoring

YavscLib/Billing/IAccountBalance.cs

@@ -0,0 +1,9 @@
+namespace YavscLib
+{
+    public interface IAccountBalance
+    {
+        long ContactCredits { get; set; }
+        decimal Credits { get; set; }
+        string UserId { get; set; }
+    }
+}

YavscLib/Billing/IEstimate.cs

@@ -0,0 +1,16 @@
+namespace YavscLib.Workflow
+{
+    using System.Collections.Generic;
+    public interface IEstimate
+    {
+        List<string> AttachedFiles { get; set; }
+        List<string> AttachedGraphics { get; }
+        string ClientId { get; set; }
+        long? CommandId { get; set; }
+        string CommandType { get; set; }
+        string Description { get; set; }
+        long Id { get; set; }
+        string OwnerId { get; set; }
+        string Title { get; set; }
+    }
+}

YavscLib/Billing/IcommandLine.cs

@@ -0,0 +1,13 @@
+namespace YavscLib.Billing
+{
+    public interface ICommandLine
+    {
+         long Id { get; set; }
+         string Description { get; set; }
+
+         int Count { get; set; }
+         decimal UnitaryCost { get; set; }
+         long EstimateId { get; set; }
+
+    }
+}