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fix: update Program.cs to use top-level statements for vs-2022 #10350

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fix: update Program.cs to use top-level statements for vs-2022 #10350

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260 changes: 127 additions & 133 deletions docs/get-started/csharp/tutorial-console.md
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Original file line number Diff line number Diff line change
Expand Up @@ -606,89 +606,85 @@ Let's get started.

```

1. Also add a new `Program` class, as follows:
1. Also add following codes to `Program` class:

```csharp
class Program
bool endApp = false;
// Display title as the C# console calculator app.
WriteLine("Console Calculator in C#\r");
WriteLine("------------------------\n");

while (!endApp)
{
static void Main(string[] args)
// Declare variables and set to empty.
string? numInput1 = "";
string? numInput2 = "";
double result = 0;

// Ask the user to type the first number.
Write("Type a number, and then press Enter: ");
numInput1 = ReadLine();

double cleanNum1 = 0;
while (!double.TryParse(numInput1, out cleanNum1))
{
bool endApp = false;
// Display title as the C# console calculator app.
Console.WriteLine("Console Calculator in C#\r");
Console.WriteLine("------------------------\n");

while (!endApp)
Write("This is not valid input. Please enter a numeric value: ");
numInput1 = ReadLine();
}

// Ask the user to type the second number.
Write("Type another number, and then press Enter: ");
numInput2 = ReadLine();

double cleanNum2 = 0;
while (!double.TryParse(numInput2, out cleanNum2))
{
Write("This is not valid input. Please enter a numeric value: ");
numInput2 = ReadLine();
}

// Ask the user to choose an operator.
WriteLine("Choose an operator from the following list:");
WriteLine("\ta - Add");
WriteLine("\ts - Subtract");
WriteLine("\tm - Multiply");
WriteLine("\td - Divide");
Write("Your option? ");

string? op = ReadLine();

// Validate input is not null, and matches the pattern
if (op == null || !Regex.IsMatch(op, "[a|s|m|d]"))
{
WriteLine("Error: Unrecognized input.");
}
else
{
try
{
// Declare variables and set to empty.
// Use Nullable types (with ?) to match type of System.Console.ReadLine
string? numInput1 = "";
string? numInput2 = "";
double result = 0;

// Ask the user to type the first number.
Console.Write("Type a number, and then press Enter: ");
numInput1 = Console.ReadLine();

double cleanNum1 = 0;
while (!double.TryParse(numInput1, out cleanNum1))
{
Console.Write("This is not valid input. Please enter a numeric value: ");
numInput1 = Console.ReadLine();
}

// Ask the user to type the second number.
Console.Write("Type another number, and then press Enter: ");
numInput2 = Console.ReadLine();

double cleanNum2 = 0;
while (!double.TryParse(numInput2, out cleanNum2))
{
Console.Write("This is not valid input. Please enter a numeric value: ");
numInput2 = Console.ReadLine();
}

// Ask the user to choose an operator.
Console.WriteLine("Choose an operator from the following list:");
Console.WriteLine("\ta - Add");
Console.WriteLine("\ts - Subtract");
Console.WriteLine("\tm - Multiply");
Console.WriteLine("\td - Divide");
Console.Write("Your option? ");

string? op = Console.ReadLine();

// Validate input is not null, and matches the pattern
if (op == null || ! Regex.IsMatch(op, "[a|s|m|d]"))
result = Calculator.Common.Calculator.DoOperation(cleanNum1, cleanNum2, op);
if (double.IsNaN(result))
{
Console.WriteLine("Error: Unrecognized input.");
WriteLine("This operation will result in a mathematical error.\n");
}
else
{
try
{
result = Calculator.DoOperation(cleanNum1, cleanNum2, op);
if (double.IsNaN(result))
{
Console.WriteLine("This operation will result in a mathematical error.\n");
}
else Console.WriteLine("Your result: {0:0.##}\n", result);
}
catch (Exception e)
{
Console.WriteLine("Oh no! An exception occurred trying to do the math.\n - Details: " + e.Message);
}
{
WriteLine("Your result: {0:0.##}\n", result);
}
Console.WriteLine("------------------------\n");

// Wait for the user to respond before closing.
Console.Write("Press 'n' and Enter to close the app, or press any other key and Enter to continue: ");
if (Console.ReadLine() == "n") endApp = true;

Console.WriteLine("\n"); // Friendly linespacing.
}
return;
catch (Exception e)
{
WriteLine("Oh no! An exception occurred trying to do the math.\n - Details: " + e.Message);
}
}

WriteLine("------------------------\n");

// Wait for the user to respond before closing.
Write("Press 'n' and Enter to close the app, or press any other key and Enter to continue: ");
if (ReadLine() == "n") endApp = true;

WriteLine("\n"); // Friendly linespacing.
}
```

Expand Down Expand Up @@ -876,83 +872,81 @@ class Calculator

class Program
{
static void Main(string[] args)
bool endApp = false;

// Display title as the C# console calculator app.
Console.WriteLine("Console Calculator in C#\r");
Console.WriteLine("------------------------\n");

while (!endApp)
{
bool endApp = false;
// Display title as the C# console calculator app.
Console.WriteLine("Console Calculator in C#\r");
Console.WriteLine("------------------------\n");
// Declare variables and set to empty.
// Use Nullable types (with ?) to match type of System.Console.ReadLine
string? numInput1 = "";
string? numInput2 = "";
double result = 0;

while (!endApp)
{
// Declare variables and set to empty.
// Use Nullable types (with ?) to match type of System.Console.ReadLine
string? numInput1 = "";
string? numInput2 = "";
double result = 0;
// Ask the user to type the first number.
Console.Write("Type a number, and then press Enter: ");
numInput1 = Console.ReadLine();

// Ask the user to type the first number.
Console.Write("Type a number, and then press Enter: ");
double cleanNum1 = 0;
while (!double.TryParse(numInput1, out cleanNum1))
{
Console.Write("This is not valid input. Please enter a numeric value: ");
numInput1 = Console.ReadLine();
}

double cleanNum1 = 0;
while (!double.TryParse(numInput1, out cleanNum1))
{
Console.Write("This is not valid input. Please enter a numeric value: ");
numInput1 = Console.ReadLine();
}
// Ask the user to type the second number.
Console.Write("Type another number, and then press Enter: ");
numInput2 = Console.ReadLine();

// Ask the user to type the second number.
Console.Write("Type another number, and then press Enter: ");
double cleanNum2 = 0;
while (!double.TryParse(numInput2, out cleanNum2))
{
Console.Write("This is not valid input. Please enter a numeric value: ");
numInput2 = Console.ReadLine();
}

double cleanNum2 = 0;
while (!double.TryParse(numInput2, out cleanNum2))
{
Console.Write("This is not valid input. Please enter a numeric value: ");
numInput2 = Console.ReadLine();
}

// Ask the user to choose an operator.
Console.WriteLine("Choose an operator from the following list:");
Console.WriteLine("\ta - Add");
Console.WriteLine("\ts - Subtract");
Console.WriteLine("\tm - Multiply");
Console.WriteLine("\td - Divide");
Console.Write("Your option? ");
// Ask the user to choose an operator.
Console.WriteLine("Choose an operator from the following list:");
Console.WriteLine("\ta - Add");
Console.WriteLine("\ts - Subtract");
Console.WriteLine("\tm - Multiply");
Console.WriteLine("\td - Divide");
Console.Write("Your option? ");

string? op = Console.ReadLine();
string? op = Console.ReadLine();

// Validate input is not null, and matches the pattern
if (op == null || ! Regex.IsMatch(op, "[a|s|m|d]"))
// Validate input is not null, and matches the pattern
if (op == null || !Regex.IsMatch(op, "[a|s|m|d]"))
{
Console.WriteLine("Error: Unrecognized input.");
}
else
{
try
{
Console.WriteLine("Error: Unrecognized input.");
}
else
{
try
{
result = Calculator.DoOperation(cleanNum1, cleanNum2, op);
if (double.IsNaN(result))
{
Console.WriteLine("This operation will result in a mathematical error.\n");
}
else Console.WriteLine("Your result: {0:0.##}\n", result);
}
catch (Exception e)
result = Calculator.DoOperation(cleanNum1, cleanNum2, op);
if (double.IsNaN(result))
{
Console.WriteLine("Oh no! An exception occurred trying to do the math.\n - Details: " + e.Message);
Console.WriteLine("This operation will result in a mathematical error.\n");
}
else Console.WriteLine("Your result: {0:0.##}\n", result);
}
Console.WriteLine("------------------------\n");
catch (Exception e)
{
Console.WriteLine("Oh no! An exception occurred trying to do the math.\n - Details: " + e.Message);
}
}

// Wait for the user to respond before closing.
Console.Write("Press 'n' and Enter to close the app, or press any other key and Enter to continue: ");
if (Console.ReadLine() == "n") endApp = true;
Console.WriteLine("------------------------\n");

Console.WriteLine("\n"); // Friendly linespacing.
}
return;
// Wait for the user to respond before closing.
Console.Write("Press 'n' and Enter to close the app, or press any other key and Enter to continue: ");
if (Console.ReadLine() == "n") endApp = true;

Console.WriteLine("\n"); // Friendly linespacing.
}
}
```
Expand Down