can someone tell me what does the ""; mean in C sharp and the purpose of to string

average - Colver txtscoretotal.Text = total.ToStTNU txtaverage.Text = average.ToString(); // in ordre EU txtscorecount.Text = count.ToString();// in order to txtscore. Focus(); txtscore.Text = ""; catch MessageBox.Show("Please Enter Numeric value");//display o reference private void btnclear_Click(object sender, EventArgs e) score - new int[20]; // to set the integer values count = 0; average = @; total = ; txtaverage.Text = txtscore.Text = txtscorecount.Text = txtscoretotal. Text 1 reference private void Brexit_Click(object sender, EventArgs e) this.Close();// in order to close teh program 1 retrance private void Forml_Load(object sender, EventArgs e) No issues found - utput from Debug soor ManalScoreCalculatortlew.exe (CLR 14.0.30319: MansoorManalscoreCalculatorNew.exe) soor ManalScorecalculatortiew.exe(CLR v4.0.30319: Mansoor ManalScorecalculatorNew.exe) soor ManalscoreCalculatorllew.exe' (CLR 14.0.30319: Mansoor Mana scorecalculatorNew.exe) soor ManalScorecalculatorten.exe' (CLR V4.0.30319: Mansoor ManalscoreCalculatorNew program (13564) Mansoor ManalscoreCalculatorllew.exe: Program Trace program (13564) Mansoor ManalScoreCalculator tew.exe ronalscorecalculatore.exe(CLR 4.0.30310: Mansoor Manals.com protron : 0135641 Martstore.exe" (CLR VA .30319: Mansoor Manaiscorecalculatornew.exe (135641 Mansoorana Scorecalcu.9.30319: Mansoor Manalscorecall ManalscorecalculatorNew.exe boor Manalscorecalculator New.exe)