C# uses inventory data collection to achieve source code examples to download, is a database program, Database folder attached file for the database. Define a public variable of type SqlConnection My_con, used to determine whether the database connection is successful

CollectionEnginery
CollectionEnginery.sln
CollectionEnginery.suo
..................\bin
..................\...\Debug
..................\...\.....\AddData.dat
..................\CollectionEnginery.csproj
..................\database
..................\........\CollectionEnginery_Data.MDF
..................\........\CollectionEnginery_Log.LDF
..................\Form1.cs
..................\Form1.Designer.cs
..................\Form1.resx
..................\Program.cs
..................\Properties
..................\..........\AssemblyInfo.cs
..................\..........\Resources.Designer.cs
..................\..........\Resources.resx
..................\..........\Settings.Designer.cs
..................\..........\Settings.settings

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