Update standard/classes.md

Nigel-Ecma · jnm2 · jskeet · commit 5fff6a4a9c2e · 2025-07-02T20:59:07.000+01:00
Co-authored-by: Joseph Musser &lt;me@jnm2.com&gt;
diff --git a/standard/classes.md b/standard/classes.md
@@ -2800,7 +2800,7 @@ A compile-time error occurs unless all of the following are true for an override
 > }
 > ```
 >
-> Without the type parameter constraints in the overriding methods, the compiler won’t know which base method is being overridden. *end example*
+> Without the type parameter constraint `where T : class`, the base method with the reference-typed type parameter cannot be overridden. *end example*
 
 An override declaration can access the overridden base method using a *base_access* ([§12.8.15](expressions.md#12815-base-access)).
 

Original file line number	Diff line number	Diff line change
`@@ -2800,7 +2800,7 @@ A compile-time error occurs unless all of the following are true for an override`
`2800`	`2800`	`> }`
`2801`	`2801`	> ```
`2802`	`2802`	`>`
`2803`		`-> Without the type parameter constraints in the overriding methods, the compiler won’t know which base method is being overridden. end example`
	`2803`	+> Without the type parameter constraint `where T : class`, the base method with the reference-typed type parameter cannot be overridden. end example
`2804`	`2804`
`2805`	`2805`	`An override declaration can access the overridden base method using a base_access ([§12.8.15](expressions.md#12815-base-access)).`
`2806`	`2806`