Invalid character in a Base-64 string for connection string

Question

I have a Sql Server 2008 R2 connection string that looks like

Answer 1

I think there is the problem

connString =ConnectionStrings.ConnectionStrings["ConnectionString"];

It should be

connString =ConnectionStrings.ConnectionStrings["DBConnectionString"];

Since you have key DBConnectionString in you configuration file not ConnectionString.

Useful link:

1. Read connection string from web.config