Guid fix; IMPORTANT

Dapper/SqlMapper.cs

@@ -928,7 +928,8 @@ private static CacheInfo GetCacheInfo(Identity identity)
 
             if (
                 (type.IsClass && type != typeof(string) && type != typeof(byte[]) && type != typeof(System.Data.Linq.Binary)) ||
-                (type.IsValueType && !type.IsPrimitive && !(type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable<>)))
+                (type.IsValueType && !type.IsPrimitive && !(type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable<>))
+                && type != typeof(Guid))
                 )
             {
                 return GetTypeDeserializer(type, reader, startBound, length, returnNullIfFirstMissing);

Tests/DapperTests.csproj

@@ -184,6 +184,7 @@
       <SubType>Designer</SubType>
     </None>
     <None Include="packages.config" />
+    <None Include="Properties\DataSources\SqlMapper.EntityFramework.tempdbEntities1.datasource" />
     <None Include="Properties\Settings.settings">
       <Generator>SettingsSingleFileGenerator</Generator>
       <LastGenOutput>Settings.Designer.cs</LastGenOutput>

Tests/Properties/DataSources/SqlMapper.EntityFramework.tempdbEntities1.datasource

+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    This file is automatically generated by Visual Studio .Net. It is 
+    used to store generic object data source configuration information.  
+    Renaming the file extension or editing the content of this file may   
+    cause the file to be unrecognizable by the program.
+-->
+<GenericObjectDataSource DisplayName="tempdbEntities1" Identifier="SqlMapper.EntityFramework.tempdbEntities1" ProviderType="Microsoft.VisualStudio.DataDesign.DataSourceProviders.EntityDataModel.EdmDataSourceProvider" Version="1.0" xmlns="urn:schemas-microsoft-com:xml-msdatasource">
+   <TypeInfo>SqlMapper.EntityFramework.tempdbEntities1, EntityFramework.Model.Designer.cs, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null</TypeInfo>
+</GenericObjectDataSource>
\ No newline at end of file

Tests/Tests.cs

@@ -45,7 +45,7 @@ public void SelectListInt()
         }
         public void SelectBinary()
         {
-            connection.Query<byte[]>("select cast(1 as varbinary(4))").First().SequenceEqual(new byte[] {1});
+            connection.Query<byte[]>("select cast(1 as varbinary(4))").First().SequenceEqual(new byte[] { 1 });
         }
         public void PassInIntArray()
         {
@@ -75,7 +75,7 @@ public void TestSchemaChanged()
         public void TestSchemaChangedMultiMap()
         {
             connection.Execute("create table #dog(Age int, Name nvarchar(max)) insert #dog values(1, 'Alf')");
-            var tuple = connection.Query<Dog,Dog,Tuple<Dog, Dog>>("select * from #dog d1 join #dog d2 on 1=1", (d1,d2) => Tuple.Create(d1, d2), splitOn: "Age").Single();
+            var tuple = connection.Query<Dog, Dog, Tuple<Dog, Dog>>("select * from #dog d1 join #dog d2 on 1=1", (d1, d2) => Tuple.Create(d1, d2), splitOn: "Age").Single();
 
             tuple.Item1.Name.IsEqualTo("Alf");
             tuple.Item1.Age.IsEqualTo(1);
@@ -83,7 +83,7 @@ public void TestSchemaChangedMultiMap()
             tuple.Item2.Age.IsEqualTo(1);
 
             connection.Execute("alter table #dog drop column Name");
-            tuple = connection.Query<Dog, Dog,Tuple<Dog, Dog>>("select * from #dog d1 join #dog d2 on 1=1", (d1, d2) => Tuple.Create(d1, d2), splitOn: "Age").Single();
+            tuple = connection.Query<Dog, Dog, Tuple<Dog, Dog>>("select * from #dog d1 join #dog d2 on 1=1", (d1, d2) => Tuple.Create(d1, d2), splitOn: "Age").Single();
 
             tuple.Item1.Name.IsNull();
             tuple.Item1.Age.IsEqualTo(1);
@@ -240,7 +240,7 @@ public void TestExecuteMultipleCommand()
 
         class Student
         {
-            public string Name {get; set;}
+            public string Name { get; set; }
             public int Age { get; set; }
         }
 
@@ -345,7 +345,7 @@ public void TestEnumerationDynamic()
         public void TestNakedBigInt()
         {
             long foo = 12345;
-            var result = connection.Query<long>("select @foo", new {foo}).Single();
+            var result = connection.Query<long>("select @foo", new { foo }).Single();
             foo.IsEqualTo(result);
         }
 
@@ -355,7 +355,7 @@ public void TestBigIntMember()
             var result = connection.Query<WithBigInt>(@"
 declare @bar table(Value bigint)
 insert @bar values (@foo)
-select * from @bar", new {foo}).Single();
+select * from @bar", new { foo }).Single();
             result.Value.IsEqualTo(foo);
         }
         class WithBigInt
@@ -937,10 +937,12 @@ class WithBizarreData
         public void TestUnexpectedDataMessage()
         {
             string msg = null;
-            try {
+            try
+            {
                 connection.Query<int>("select count(1) where 1 = @Foo", new WithBizarreData { Foo = new GenericUriParser(GenericUriParserOptions.Default), Bar = 23 }).First();
 
-            } catch(Exception ex)
+            }
+            catch (Exception ex)
             {
                 msg = ex.Message;
             }
@@ -1064,7 +1066,7 @@ public void TestDynamicParamNullSupport()
             var p = new DynamicParameters();
 
             p.Add("@b", dbType: DbType.Int32, direction: ParameterDirection.Output);
-            connection.Execute("select @b = null",p);
+            connection.Execute("select @b = null", p);
 
             p.Get<int?>("@b").IsNull();
         }
@@ -1144,7 +1146,7 @@ public void TestAppendingAnonClasses()
         public void TestAppendingAList()
         {
             DynamicParameters p = new DynamicParameters();
-            var list = new int[] {1,2,3};
+            var list = new int[] { 1, 2, 3 };
             p.AddDynamicParams(new { list });
 
             var result = connection.Query<int>("select * from (select 1 A union all select 2 union all select 3) X where A in @list", p).ToList();
@@ -1154,5 +1156,23 @@ public void TestAppendingAList()
             result[2].IsEqualTo(3);
         }
 
+        public void TestUniqueIdentifier()
+        {
+            var guid = Guid.NewGuid();
+            var result = connection.Query<Guid>("declare @foo uniqueidentifier set @foo = @guid select @foo", new { guid }).Single();
+            result.IsEqualTo(guid);
+        }
+        public void TestNullableUniqueIdentifierNonNull()
+        {
+            Guid? guid = Guid.NewGuid();
+            var result = connection.Query<Guid?>("declare @foo uniqueidentifier set @foo = @guid select @foo", new { guid }).Single();
+            result.IsEqualTo(guid);
+        }
+        public void TestNullableUniqueIdentifierNull()
+        {
+            Guid? guid = null;
+            var result = connection.Query<Guid?>("declare @foo uniqueidentifier set @foo = @guid select @foo", new { guid }).Single();
+            result.IsEqualTo(guid);
+        }
     }
 }