C#

FieldInfo fieldInfo = this.GetType().GetField("YourTextBoxVariableHere", BindingFlags.Instance | BindingFlags.NonPublic);
if (fieldInfo != null)
   fieldInfo.SetValue(this, "Your Text Here");

private Control FindBox(string text)<br />
{<br />
    Control[] Controls = GCS_Payroll.ActiveForm.Controls.Find(text, true);<br />
    return Controls[0];<br />
}

Form form = (Form)Type.GetType("frmForm274").GetConstructor(new Type[0]).Invoke(new object[0]));

//some field
private HashTable _formsHash = new HashTable();
public Form GetForm(strFormName){
   if (!_formsHash.ContainsKey(strFormName)) {
      _formsHash.Add(strFormName, Type.GetType(strFormName).GetConstructor(new Type[0]).Invoke(new object[0])));
   }
   return (Form)formsHash[strFormName];
}

Form form = (Form)Type.GetType("frmForm274").GetConstructor(new Type[0]).Invoke(new object[0]));

<appSettings>
  <add key="yourkey" value="yourvalue" />
</appSettings>

System.Configuration.ConfigurationSettings.AppSettings["yourkey"];

static FileInfo FindFile(string startDirectory, string extension)
{
	DirectoryInfo di = new DirectoryInfo(startDirectory);
	foreach(FileInfo fi in di.GetFiles())
	{
		if(fi.Extension.ToLower() == extension)
			return fi;
	}
	return null;
}

static DirectoryInfo FindDirectory(string startDirectory, string dirNameToSearch)
{
	DirectoryInfo di = new DirectoryInfo(startDirectory);
	foreach(DirectoryInfo diSearch in di.GetDirectories())
	{
		if(diSearch.Name == dirNameToSearch)
		        return diSearch;
	}
	return null;
}

string strSQL = "SELECT * FROM MyTable WHERE username = '" +<br />
Request.Form["username"] + "'";<br />
<br />
if (db.Execute().Rows.Count != 1) // Asuming that db.Execute is executing strSQL and that it returns a DataTable (if it returns a DataSet u need to do db.Execute().Tables[0].Rows.Count).<br />
// Now do the insert<br />
else<br />
Response.Write ("Record exists");