C# - Get database connection string from Web.config file

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To get the database connection string from IIS Web.config file using C# code, include System.Configuration directive and then create a string variable to assign the connection string like this:

using System.Configuration;
string connStr = ConfigurationManager.ConnectionStrings["connectionString_Name"].ConnectionString;
If “ConfigurationManager” is not recognized you will need to add reference to: "System.Configuration".See: C# - How to add reference to project