Support duration (fixes #258)

Author: Michael Ganss

XmlSchemaClassGenerator/CodeUtilities.cs

@@ -177,7 +177,7 @@ public static Type GetEffectiveType(this XmlSchemaDatatype type, GeneratorConfig
             var resultType = type.TypeCode switch
             {
                 XmlTypeCode.AnyAtomicType => typeof(string),// union
-                XmlTypeCode.AnyUri or XmlTypeCode.Duration or XmlTypeCode.GDay or XmlTypeCode.GMonth or XmlTypeCode.GMonthDay or XmlTypeCode.GYear or XmlTypeCode.GYearMonth => typeof(string),
+                XmlTypeCode.AnyUri or XmlTypeCode.GDay or XmlTypeCode.GMonth or XmlTypeCode.GMonthDay or XmlTypeCode.GYear or XmlTypeCode.GYearMonth => typeof(string),
                 XmlTypeCode.Time => typeof(DateTime),
                 XmlTypeCode.Idref => typeof(string),
                 XmlTypeCode.Integer or XmlTypeCode.NegativeInteger or XmlTypeCode.NonNegativeInteger or XmlTypeCode.NonPositiveInteger or XmlTypeCode.PositiveInteger => GetIntegerDerivedType(type, configuration, restrictions),
@@ -373,6 +373,7 @@ public static KeyValuePair<NamespaceKey, string> ParseNamespace(string nsArg, st
             ("System.ComponentModel.DataAnnotations", c => c.CompactTypeNames && (c.DataAnnotationMode != DataAnnotationMode.None || c.EntityFramework)),
             ("System.Diagnostics", c => c.CompactTypeNames && c.GenerateDebuggerStepThroughAttribute),
             ("System.Linq", c => c.EnableDataBinding),
+            ("System.Xml", c => c.CompactTypeNames),
             ("System.Xml.Schema", c => c.CompactTypeNames),
             ("System.Xml.Serialization", c => c.CompactTypeNames)
         };

XmlSchemaClassGenerator/TypeModel.cs

@@ -1479,6 +1479,12 @@ public override CodeExpression GetDefaultValueFor(string defaultString, bool att
                     "Parse", new CodePrimitiveExpression(defaultString));
                 return rv;
             }
+            else if (type == typeof(TimeSpan))
+            {
+                var rv = new CodeMethodInvokeExpression(new CodeTypeReferenceExpression(CodeUtilities.CreateTypeReference(typeof(XmlConvert), Configuration)),
+                    "ToTimeSpan", new CodePrimitiveExpression(defaultString));
+                return rv;
+            }
             else if (type == typeof(bool) && !string.IsNullOrWhiteSpace(defaultString))
             {
                 if (defaultString == "0")