From 3b98b1ef364726407adc23a60287d31462a202a2 Mon Sep 17 00:00:00 2001
From: Rhodon <rhodonvantilburg@gmail.com>
Date: Wed, 11 Jan 2023 14:26:43 +0100
Subject: [PATCH] Some clarifying comments for extracting the original
 expression type in a member expression

---
 .../Services/ProjectableExpressionReplacer.cs                   | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/EntityFrameworkCore.Projectables/Services/ProjectableExpressionReplacer.cs b/src/EntityFrameworkCore.Projectables/Services/ProjectableExpressionReplacer.cs
index 84f5283..d304b29 100644
--- a/src/EntityFrameworkCore.Projectables/Services/ProjectableExpressionReplacer.cs
+++ b/src/EntityFrameworkCore.Projectables/Services/ProjectableExpressionReplacer.cs
@@ -77,6 +77,8 @@ namespace EntityFrameworkCore.Projectables.Services
             var nodeExpression = node.Expression switch {
                 UnaryExpression { NodeType: ExpressionType.Convert, Type: { IsInterface: true } type, Operand: { } operand }
                     when type.IsAssignableFrom(operand.Type)
+                    // This is an interface member. Operand contains the concrete (or at least more concrete) expression,
+                    // from which we can try to find the concrete member.
                     => operand,
                 _ => node.Expression
             };