//1st

//Before:

TreeNode node = new TreeNode(drive.Substring(0, 1), driveImage, driveImage);

node.Tag = drive;

​

//After:

var node = new TreeNode(drive.Substring(0, 1), driveImage, driveImage) {

    Tag = drive

};

​

//2nd

//Before:

DirectoryInfo di = new DirectoryInfo(dir);

TreeNode node = new TreeNode(di.Name, 0, 1); //this line

​

//After:

var node = new TreeNode((new DirectoryInfo(dir)).Name, 0, 1);

​

//3rd

//Before:

OleDbCommand select = new OleDbCommand();//this line

select.Connection = cnDTC;

select.CommandText = string.Format("SELECT MAX(VERSION_NO) AS MAX_VERSION FROM ({0})",

      strSQL2);

​

//After:

var select = new OleDbCommand(

      String.Format("SELECT MAX(VERSION_NO) AS MAX_VERSION FROM ({0})", strSQL2), 

      cnDTC);

​

//3rd (with string interpolation):

var select = new OleDbCommand($"SELECT MAX(VERSION_NO) AS MAX_VERSION FROM ({strSQL2})", 

      cnDTC);