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c# - How to get data by SqlDataReader.GetValue by column name

I use SqlDataReader.GetValue method to read values from DB:

Log.WriteLine("Value of CompanyName column:" + thisReader.GetValue(1)); 

As parameter GetValue get index of column. How could I specify Column Name instead index?

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Log.WriteLine("Value of CompanyName column:" + thisReader["CompanyName"]); 

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