Add F1 help for with

It now needs a disambiguation

Author: BillWagner

docs/csharp/language-reference/keywords/index.md

@@ -166,7 +166,7 @@ A contextual keyword provides a specific meaning in the code, but it isn't a res
         [`when` (filter condition)](when.md)  
         [`where` (generic type constraint)](where-generic-type-constraint.md)  
         [`where` (query clause)](where-clause.md)  
-        [`with`](../operators/with-expression.md)  
+        [`with`](with.md)  
         [`yield`](../statements/yield.md)  
     :::column-end:::
 :::row-end:::

docs/csharp/language-reference/keywords/with.md

@@ -0,0 +1,21 @@
+---
+description: "with - C# Reference"
+title: "`with` contextual keyword"
+ms.date: 02/06/2026
+f1_keywords: 
+  - "with"
+  - "with_CSharpKeyword"
+helpviewer_keywords: 
+  - "with keyword [C#]"
+---
+
+# `with` (C# reference)
+
+Use the `with` keyword in the following contexts:
+
+- In a [`with` expression](../operators/with-expression.md) to create a copy and apply modifications to one or more properties.
+- In a [collection expression](../operators/collection-expressions.md) to specify parameters to the constructor for the initialized collection.
+
+## See also
+
+- [C# Keywords](index.md)

docs/csharp/language-reference/operators/with-expression.md

@@ -2,11 +2,6 @@
 title: "The with expression - create new objects that are modified copies of existing objects"
 description: "Learn about a with expression that performs nondestructive mutation of C# records and structures. The `with` keyword provides the means to modify one or more properties in the new object."
 ms.date: 01/20/2026
-f1_keywords:
-  - "with_CSharpKeyword"
-helpviewer_keywords:
-  - "with expression [C#]"
-  - "with operator [C#]"
 ---
 # The `with` expression - Nondestructive mutation creates a new object with modified properties