fixup! Add support for querying dynamic objects with Linq

Author: hazzik

src/NHibernate/Linq/Visitors/ExpressionKeyVisitor.cs

@@ -1,9 +1,11 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.Dynamic;
 using System.Linq;
 using System.Linq.Expressions;
 using System.Reflection;
+using System.Runtime.CompilerServices;
 using System.Text;
 using NHibernate.Param;
 using Remotion.Linq.Parsing;
@@ -214,6 +216,13 @@ protected override Expression VisitQuerySourceReference(Remotion.Linq.Clauses.Ex
 			return expression;
 		}
 
+		protected override Expression VisitDynamic(DynamicExpression expression)
+		{
+			FormatBinder(expression.Binder);
+			Visit(expression.Arguments, AppendCommas);
+			return expression;
+		}
+
 		private void VisitMethod(MethodInfo methodInfo)
 		{
 			_string.Append(methodInfo.Name);
@@ -224,5 +233,51 @@ private void VisitMethod(MethodInfo methodInfo)
 				_string.Append(']');
 			}
 		}
+
+		private void FormatBinder(CallSiteBinder binder)
+		{
+			switch (binder)
+			{
+				case ConvertBinder b:
+					_string.Append("Convert ").Append(b.Type);
+					break;
+				case CreateInstanceBinder _:
+					_string.Append("Create");
+					break;
+				case DeleteIndexBinder _:
+					_string.Append("DeleteIndex");
+					break;
+				case DeleteMemberBinder b:
+					_string.Append("DeleteMember ").Append(b.Name);
+					break;
+				case BinaryOperationBinder b:
+					_string.Append(b.Operation);
+					break;
+				case GetIndexBinder _:
+					_string.Append("GetIndex");
+					break;
+				case GetMemberBinder b:
+					_string.Append("GetMember ").Append(b.Name);
+					break;
+				case InvokeBinder _:
+					_string.Append("Invoke");
+					break;
+				case InvokeMemberBinder b:
+					_string.Append("InvokeMember ").Append(b.Name);
+					break;
+				case SetIndexBinder _:
+					_string.Append("SetIndex");
+					break;
+				case SetMemberBinder b:
+					_string.Append("SetMember ").Append(b.Name);
+					break;
+				case UnaryOperationBinder b:
+					_string.Append(b.Operation);
+					break;
+				case DynamicMetaObjectBinder _:
+					_string.Append("DynamicMetaObject");
+					break;
+			}
+		}
 	}
 }