turn off .NET Interactive (dotnet#4839)

Author: mairaw

xml/System.Text/Encoding.xml

@@ -3918,7 +3918,7 @@ In .NET 5.0 and later versions, the code page name `utf-7` is not supported.
  The following example checks the values of the Boolean properties of each encoding.
 
  :::code language="cpp" source="~/samples/snippets/cpp/VS_Snippets_CLR_System/system.Text.Encoding.IsProps/CPP/isprops.cpp" id="Snippet1":::
- :::code language="csharp" source="~/samples/snippets/csharp/VS_Snippets_CLR_System/system.Text.Encoding.IsProps/CS/isprops.cs" interactive="try-dotnet" id="Snippet1":::
+ :::code language="csharp" source="~/samples/snippets/csharp/VS_Snippets_CLR_System/system.Text.Encoding.IsProps/CS/isprops.cs" id="Snippet1":::
  :::code language="vb" source="~/samples/snippets/visualbasic/VS_Snippets_CLR_System/system.Text.Encoding.IsProps/VB/isprops.vb" id="Snippet1":::
 
  ]]></format>