Assert

Visual C# Tutorials

Visual C# .NET Tutorials

Testing and Debugging Default Assert Fail Write, WriteLine Indent, Unindent WriteIf, WriteLineIf

edit

Assert is perfect if you want to be informed via a message box if something doesn’t meet your expectations.

Contents 1 Example 2 Result in Development Mode 3 Result from Debug Build 4 Result from Release Build

Example

using System;
using System.Windows.Forms;
using System.Diagnostics;
 
namespace debugTesting {
 
  public partial class Form1 : Form {
 
    public Form1() {
 
      InitializeComponent();
    }
 
    private void pass_Click(object sender, EventArgs e) {
 
      int tempValue = 42;
 
      Debug.Assert(tempValue > 0);
 
      MessageBox.Show("I got here... Just as I should.. No Error");
    }
 
    private void fail_Click(object sender, EventArgs e) {
 
      int tempValue = -42;
 
      Debug.Assert(tempValue > 0);
 
      MessageBox.Show("If I get here...Well.. Something's not right");
    }    
  }
}

Result in Development Mode

Result from Debug Build

Result from Release Build