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Proper way to open and close connection in loop

c# ado.net

Can you use cmd.ExecuteScalar when the sproc uses RETURN @value

c# ado.net executescalar

How do you insert an entity for a many-to-many relationship? (entity framework)

DataTable.Merge and DataTable.ImportRow does not change RowState

.net ado.net oledb

Passing database name as variable to SQL from C#. Is it possible?

Connection string for default instance like for named instance

How to get to the primary key of a self tracking entity?

Is it possible to use $action of the MERGE statement in output variable of stored procedure?

c# sql-server database ado.net

Linq to Entities: see the resulting query (context.Log = Console.Out)

When I enter data that exceeds the column length it won't throw an exception in ASP.NET

c# asp.net sql exception ado.net

System.InvalidCastException: Failed to convert parameter value from a XElement to a String

What is the difference between using a DataContext class and SqlConnection?

Why to use using statement on DbTransaction in ADO.NET / C#?

Can I use LINQ without Entity Framework?

c# sql linq ado.net

Copying data from one DataTable to another

c# ado.net

How is timezone handled in the lifecycle of an ADO.NET + SQL Server DateTime column?

C# How can I get each column type and length and then use the lenght to padright to get the spaces at the end of each field

c# ado.net metadata datareader

What data type does the SQLCommand method ExecuteScalar() return?

How to read an .XLSX (Excel 2007) file using ADO.NET? I am finding "Could not find installable ISAM"-error

Ado.net ExecuteScalar() returning null