Fix Type.Namespace remarks (dotnet#7466)

MSDN-WhiteKnight · web-flow · commit 5028a16eec67 · 2021-12-08T11:19:07.000-08:00
diff --git a/xml/System/Type.xml b/xml/System/Type.xml
@@ -15587,7 +15587,7 @@ If the value of this property is `true` for an array type, it can be used to cre
   
  If the current <xref:System.Type> represents a constructed generic type, this property returns the namespace that contains the generic type definition. Similarly, if the current <xref:System.Type> represents a generic parameter `T`, this property returns the namespace that contains the generic type definition that defines `T`.  
   
- If the current <xref:System.Type> object represents a generic parameter, this property returns `null`.  
+ If the current <xref:System.Type> object represents a generic parameter and a generic type definition is not available, such as for a signature type returned by <xref:System.Type.MakeGenericMethodParameter%2A>, this property returns `null`.
   
    
   

Original file line number	Diff line number	Diff line change
@@ -15587,7 +15587,7 @@ If the value of this property is `true` for an array type, it can be used to cre
`15587`	`15587`
`15588`	`15588`	If the current <xref:System.Type> represents a constructed generic type, this property returns the namespace that contains the generic type definition. Similarly, if the current <xref:System.Type> represents a generic parameter `T`, this property returns the namespace that contains the generic type definition that defines `T`.
`15589`	`15589`
`15590`		- If the current <xref:System.Type> object represents a generic parameter, this property returns `null`.
	`15590`	+ If the current <xref:System.Type> object represents a generic parameter and a generic type definition is not available, such as for a signature type returned by <xref:System.Type.MakeGenericMethodParameter%2A>, this property returns `null`.
`15591`	`15591`
`15592`	`15592`
`15593`	`15593`