Detect the following issues found in the forms

"all global variables need to be initalized

total score should not be a double

isValid is not properly implemented

: upgrade grade is not supposed to return an int

Perfect score label does not get updated"

Form1

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace prob2

{

//prob2

public partial class Form1 : Form

{

private double totalscoreDouble; //The total scores all added up

private int aInt, perfectscoreInt, bInt; //The count for A and B grades

private int scorecountInt; //The total count of number of scores

public Form1()

{

InitializeComponent();

}

private void button1_Click( object sender, EventArgs e )

{

//Declarations

int scoreInt;

string outputstring;

bool isValidBool, isNotValidString;

//Inputs

scoreInt = int.Parse(textBox1.Text);

//Computations

isValidBool = IsValid(scoreInt);

scorecountInt = ComputeGradeCount(scoreInt);

//Outputs

Display(scoreInt.ToString());

textBox1.Clear();

textBox1.Focus();

}

private int ComputeGradeCount(int score)

{

int scorecount;

if (score == 100)

{

perfectscoreInt = perfectscoreInt + 1;

}

totalscoreDouble = totalscoreDouble + score;

if (score > 89)

{

aInt = aInt + 1;

scorecountInt = scorecountInt + 1;

}

else if (score > 69)

{

bInt = bInt + 1;

scorecountInt = scorecountInt + 1;

}

else if (score

{

scorecountInt = scorecountInt + 1;

}

return scorecountInt;

}

private void Display(string outputstring )

{

textBox2.AppendText(outputstring);

textBox2.AppendText(Environment.NewLine);

}

private void Display2 (string outputstring)

{

}

private void button2_Click( object sender, EventArgs e )

{

double averageDouble;

averageDouble = ComputeAvg();

if (scorecountInt == 0)

{

Display3("No Score Entered");

}

else

{

Display3("Average: " + averageDouble.ToString("N2"));

Display3("Count of Letter Grades");

Display3("A: " + aInt.ToString());

Display3("B: " + bInt.ToString());

}

}

private double ComputeAvg()

{

double avg = 0;

if (scorecountInt != 0)

{

avg = totalscoreDouble / scorecountInt;

}

return avg;

}

private void button3_Click( object sender, EventArgs e )

{

ResetData();

textBox1.Clear();

textBox2.Clear();

textBox3.Clear();

textBox1.Focus();

}

private void ResetData()

{

totalscoreDouble = 0;

aInt = 0;

bInt = 0;

scorecountInt = 0;

}

private void button4_Click( object sender, EventArgs e )

{

Application.Exit();

}

private void Display3( string outputString )

{

textBox3.AppendText(outputString);

textBox3.AppendText(Environment.NewLine);

}

private bool IsValid( int score)

{

bool IsValid;

if (score > 0 && score

{

IsValid = true;

}

else

{

IsValid = false;

}

return IsValid;

}

}

}

namespace Prob2 partial class Form1 ///

/// Required designer variable. ///

private System.ComponentModel. I Container components = null; ///

/// clean up any resources being used. ///

/// true if managed resources should be disposed; otherwise, false. protected override void Dispose( bool disposing ) if (disposing && (components != null)) components. Dispose(); base. Dispose (disposing); #region Windows Form Designer generated code ///

/// Required method for Designer support - do not modify /// the contents of this method with the code editor. ///

private void InitializeComponent() this.textBox1 = new System.Windows.Forms.TextBox(); this.textBox2 = new System.Windows.Forms.TextBox(); this. label1 = new System.Windows.Forms. Label(); this.label2 = new System.Windows.Forms. Label(); this.button1 = new System.Windows.Forms.Button(); this.label3 = new System.Windows.Forms. Label(); this.button2 = new System.Windows.Forms.Button(); this.button3 = new System.Windows.Forms.Button(); this.textBox3 = new System.Windows.Forms.TextBox(); this.label4 = new System.Windows.Forms. Label(); this.button4 = new System.Windows.Forms.Button(); this.label5 = new System.Windows.Forms. Label(); this. SuspendLayout(); // textBox1 this.textBox1.Location = new System.Drawing.Point(117, 51); this.textBox1.Name = "textBox1"; this.textBox1.Size = new System.Drawing.Size (81, 20); this.textBox1.TabIndex = 0; // text Box2 this.textBox2.Location = new System.Drawing.Point(21, 51); this.textBox2.Multiline = true; this.textBox2.Name = "textBox2"; this.textBox2.Readonly = true; this.textBox2.Size = new System.Drawing.Size(70, 356); this.textBox2.TabIndex = 1; // labell this.labell. AutoSize = true; this.labell. Location = new System.Drawing.Point (114, 35); this.label1.Name = "labell"; this.label1.Size = new System.Drawing.Size (66, 13); this.labell.TabIndex = 2; this.label1.Text = "Enter Score "; // label2 // this.label2. AutoSize = true; this.labe 12. Location = new System.Drawing.Point(36, 35); this.label2.Name = "label2"; this.label2.Size = new System.Drawing.Size (38, 13); this.label2.TabIndex = 3; this.labe12. Text = "Score"; // button1 this.button1. Location = new System.Drawing.Point (117, 82); this.button1.Name = "button1"; this.button1.Size = new System.Drawing.Size (104, 36); this.buttoni.TabIndex = 4; this.button1.Text = "Submit Score"; this.button1.UseVisual Style BackColor = true; this.button1.click += new System.EventHandler (this.button1 click); // labe13 this.label3. AutoSize = true; this.labe13. Location = new System.Drawing.Point(117, 130); this.labe13. Name = "label3"; this.label3.Size = new System.Drawing.Size (66, 13); this.label3.TabIndex = 5; this.labe13. Text = "Perfet Score"; // button2 this.button2.Location = new System.Drawing.Point (117, 160); this.button2.Name = "button2"; this.button2.Size = new System.Drawing.Size (104, 32); this.button2 .TabIndex = 6; this.button2.Text = "Calculate Avg"; this.button2.UseVisual Style BackColor = true; this.button2.click += new System.EventHandler (this.button2_Click); // button3 this.button3. Location = new System.Drawing.Point (117, 198); this.button3.Name = "button3"; this.button3.Size = new System.Drawing.Size (104, 32); this.button3.TabIndex = 7; this.button3.Text = "Clear Scores"; this.button3.UseVisual Style BackColor = true; this.button3.click += new System.EventHandler (this.button3 Click); // textBox3 this.textBox3.Location = new System.Drawing.Point (239, 51); this.textBox3.Multiline = true; this.textBox3.Name = "textBox3"; this.textBox3.Readonly = true; this.textBox3.Size = new System.Drawing.Size(155, 346); this.textBox3.TabIndex = 8; // label4 this.label4. AutoSize = true; this.labe 14. Location = new System.Drawing.Point (236, 35); this.label4.Name = "label4"; this.label4.Size = new System.Drawing.Size (45, 13); this.label4.TabIndex = 9; this.label4.Text = "Results"; // button 4 this.button4. Location = new System.Drawing.Point (117, 236); this.button4.Name = "button4"; this.button4.Size = new System.Drawing.Size (104, 34); this.button4.TabIndex = 10; this.button4.Text = "Exit"; this.button4. UseVisual Style BackColor = true; this.button4.Click += new System.EventHandler (this.button4 Click); // label5 this.label5. AutoSize = true; this.label5. Location = new System.Drawing.Point (252, 410); this.label5.Name = "label5"; this.label5.Size = new System.Drawing.Size (142, 13); this.label5.TabIndex = 11; this.label5. Text = "Created By Prob2"; // Form1 this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode. Font; this.clientSize = new System.Drawing.Size(416, 432); this.Controls.Add(this.label5); this.Controls.Add(this.button4); this.Controls.Add(this.label 4); this.Controls.Add(this.textBox 3); this.Controls.Add(this.button3); this.Controls.Add(this.button2); this.Controls.Add(this.labe13); this.Controls.Add(this.buttonl); this.Controls.Add(this.label2); this.Controls.Add(this.labell); this.Controls.Add(this.textBox2); this.Controls.Add(this.textBox1); this.Name = "Forml"; this.Start Position = System.Windows.Forms. FormStart Position. Center Screen; this.Text = "Form1"; this. Resume Layout (false); this. Perform Layout(); #endregion private System.Windows.Forms. TextBox textBox1; private System.Windows.Forms.TextBox textBox2; private System.Windows.Forms. Label labell; private System.Windows.Forms. Label label2; private System.Windows.Forms.Button buttonl; private System.Windows.Forms. Label labe13; private System.Windows.Forms.Button button2; private System.Windows.Forms.Button button3; private System.Windows.Forms.TextBox textBox 3; private System.Windows.Forms. Label label4; private System.Windows.Forms.Button button4; private System.Windows.Forms. Label label5