From 097f5031cc2444f2fdb1a3174937fda609491976 Mon Sep 17 00:00:00 2001
From: Cyrus Najmabadi <cyrus.najmabadi@gmail.com>
Date: Mon, 13 Jan 2020 19:21:19 -0800
Subject: [PATCH] Simplify

---
 .../Extensions/ExpressionSyntaxExtensions.cs      | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/src/Workspaces/CSharp/Portable/Extensions/ExpressionSyntaxExtensions.cs b/src/Workspaces/CSharp/Portable/Extensions/ExpressionSyntaxExtensions.cs
index e15b96769b7..ff6a3fdc44e 100644
--- a/src/Workspaces/CSharp/Portable/Extensions/ExpressionSyntaxExtensions.cs
+++ b/src/Workspaces/CSharp/Portable/Extensions/ExpressionSyntaxExtensions.cs
@@ -216,20 +216,15 @@ public static bool IsLeftSideOfDot(this ExpressionSyntax expression)
         }
 
         public static bool IsLeftSideOfSimpleMemberAccessExpression(this ExpressionSyntax expression)
-            => expression != null && expression.IsParentKind(SyntaxKind.SimpleMemberAccessExpression) && ((MemberAccessExpressionSyntax)expression.Parent).Expression == expression;
+            => (expression?.Parent).IsKind(SyntaxKind.SimpleMemberAccessExpression, out MemberAccessExpressionSyntax memberAccess) &&
+               memberAccess.Expression == expression;
 
         public static bool IsLeftSideOfDotOrArrow(this ExpressionSyntax expression)
-        {
-            return
-                IsLeftSideOfQualifiedName(expression) ||
-                (expression.Parent is MemberAccessExpressionSyntax && ((MemberAccessExpressionSyntax)expression.Parent).Expression == expression);
-        }
+            => IsLeftSideOfQualifiedName(expression) ||
+               (expression.Parent is MemberAccessExpressionSyntax memberAccess && memberAccess.Expression == expression);
 
         public static bool IsLeftSideOfQualifiedName(this ExpressionSyntax expression)
-        {
-            return
-                expression.IsParentKind(SyntaxKind.QualifiedName) && ((QualifiedNameSyntax)expression.Parent).Left == expression;
-        }
+            => (expression?.Parent).IsKind(SyntaxKind.QualifiedName, out QualifiedNameSyntax qualifiedName) && qualifiedName.Left == expression;
 
         public static bool IsLeftSideOfExplicitInterfaceSpecifier(this NameSyntax name)
             => name.IsParentKind(SyntaxKind.ExplicitInterfaceSpecifier);
-- 
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