Fix subquery support

Author: pmoleri

NorthwindCRUD/.vscode/tasks.json

@@ -0,0 +1,41 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "build",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "build",
+                "${workspaceFolder}/NorthwindCRUD.sln",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary;ForceNoAlign"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "publish",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "publish",
+                "${workspaceFolder}/NorthwindCRUD.sln",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary;ForceNoAlign"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "watch",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "watch",
+                "run",
+                "--project",
+                "${workspaceFolder}/NorthwindCRUD.sln"
+            ],
+            "problemMatcher": "$msCompile"
+        }
+    ]
+}

NorthwindCRUD/NorthwindCRUD.sln

@@ -0,0 +1,24 @@
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.5.2.0
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "NorthwindCRUD", "NorthwindCRUD.csproj", "{A0D23213-EEA1-7104-1A67-9ED52FDE887F}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{A0D23213-EEA1-7104-1A67-9ED52FDE887F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A0D23213-EEA1-7104-1A67-9ED52FDE887F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A0D23213-EEA1-7104-1A67-9ED52FDE887F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{A0D23213-EEA1-7104-1A67-9ED52FDE887F}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {BB60B76A-7CB6-43CA-948B-625C7A90366C}
+	EndGlobalSection
+EndGlobal

NorthwindCRUD/QueryBuilder/QueryExecutor.cs

@@ -213,7 +213,7 @@ private static Expression BuildInExpression(DataContext db, Query? query, Member
 
     private static Expression BuildInExpression<T>(DataContext db, Query? query, MemberExpression field)
     {
-        var d = RunSubquery(db, query).Select(x => (T)ProjectField(x, query?.ReturnFields[0] ?? string.Empty)).ToArray();
+        var d = RunSubquery(db, query).Select(x => (T)ProjectField(x, query?.ReturnFields[0] ?? string.Empty)).Distinct();
         var m = typeof(Enumerable).GetMethods()
             .FirstOrDefault(method => method.Name == nameof(Enumerable.Contains) && method.GetParameters().Length == 2)
             ?.MakeGenericMethod(typeof(T)) ?? throw new InvalidOperationException("Missing method");
@@ -244,10 +244,10 @@ private static IEnumerable<dynamic> RunSubquery(DataContext db, Query? query)
         };
     }
 
-    private static dynamic? ProjectField(dynamic? obj, string field)
+    private static dynamic? ProjectField(object? obj, string field)
     {
-        var property = obj?.GetType().GetProperty(field, BindingFlags.IgnoreCase | BindingFlags.Public | BindingFlags.Instance) ?? throw new InvalidOperationException($"Property '{field}' not found on type '{obj?.GetType()}'");
-        return property?.GetValue(obj);
+        var property = obj?.GetType().GetMember(field, BindingFlags.IgnoreCase | BindingFlags.Public | BindingFlags.Instance)?.FirstOrDefault() ?? throw new InvalidOperationException($"Property '{field}' not found on type '{obj?.GetType()}'");
+        return property.GetMemberValue(obj);
     }
 
     private static Expression GetSearchValue(dynamic? value, Type targetType)