Merge pull request #268011 from btardif/pg

Note for .NET EnvironmentVariablesConfigurationProvider issue

Author: prmerger-automator[bot]

articles/app-service/configure-common.md

@@ -216,6 +216,10 @@ At runtime, connection strings are available as environment variables, prefixed
 * Custom: `CUSTOMCONNSTR_`
 * PostgreSQL: `POSTGRESQLCONNSTR_`  
 
+>[!Note]
+> .NET apps targeting PostgreSQL should set the connection string to **Custom** as workaround for a [knows issue in .NET EnvironmentVariablesConfigurationProvider](https://github.com/dotnet/runtime/issues/36123) 
+>
+
 For example, a MySQL connection string named *connectionstring1* can be accessed as the environment variable `MYSQLCONNSTR_connectionString1`. For language-stack specific steps, see:
 
 - [ASP.NET Core](configure-language-dotnetcore.md#access-environment-variables)