ASP.NET Tips #46 - Eagerly create common object types to prevent constant evaluation

Many of us use code frequently in applications. For example:

if (myobject.GetType() == typeof(bool)) 
{ 
  // Do something 
}

-- Or --

if (myobject.GetType() == typeof()(MyCustomObject))
{ 
  // Do something 
}

Instead, consider eagerly creating these type of instances:

public static class CommonTypes
{
  public static readonly Type TypeOfBoolean = typeof(bool);
  public static readonly Type TypeOfString = typeof(string);
}

You can then do the following:

if (arg.GetType() == CommonTypes.TypeOfBoolean)
{
  // Do something
}

Or:

if (arg.GetType() == CommonTypes.TypeOfString)
{
  // Do something
}

And save the cost of performing the typeof(bool) or typeof(string) repeatedly in your code.