T4 Generator (edit)
Given name of stored procedure, generate C# class to using it:
https://www.codeproject.com/Articles/29416/Class-Generator-for-SQL-Server-Stored-Procedures (17 Sep 2008)
https://gist.github.com/litera/11205851
https://www.codeproject.com/Articles/8397/C-Code-Generator-for-Stored-Procedures (2006)
https://www.codeproject.com/Articles/7592/Wrapper-Generator-for-SQL-Server-Stored-Procedures (1 Jul 2004)
https://www.codeproject.com/Articles/8827/Stored-Procedure-class-generator (22 Nov 2004)
https://sourceforge.net/projects/spcaller/
VIEW NULLABLE OF PARAMS
DECLARE @Lines TABLE (Line NVARCHAR(MAX)) ;
DECLARE @FullText NVARCHAR(MAX) = '' ;
INSERT @Lines EXEC sp_helptext 'InsertLogFailedLogin' ;
SELECT @FullText = @FullText + Line FROM @Lines ;
PRINT @FullText