how to take average of two text box values C# -

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I used this code, but it seems that it does not work. 

  Private zero txtBfrLeft1_Leave (Object Sender, EventArgs E) {If (txtBfrRight1.Text! = "" || txtBfrLeft1.Text! = "") {Int befrAvg1 = (convert. (TxtBfrRight1. Text) + Convert. Repeat (txtBfrLeft1.Text)) / 2; TxtBfrAvg1.Text = BIFVG 1.ToString (); }}

Try it out: 

  double bef 1 = (new [] {double. Purse (txtBfrRight1.Text), double. Purse (txtBfrLeft1.Text)}). Average ();

Or if you want the result as an integer then it: 

  int befrAvg1 = (int) ((new [] {double. Parse (TxtBfrRight1.Text), Double Percy (txtBfrLeft1.Text)}). Average ());

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