Question

Can anyone provide a real life senario where Type Forward is use?

Answer 1

The BCL libraries commonly use the TypeForwardedTo attribute when different versions of the framework move a type between assemblies. For example, the Func<> style delegates were moved from System.Core in the 3.5 framework to mscorlib in the 4.0 framework.

You can view real world uses of this by opening System.Core.dll from 4.0 in ildasm, double clicking on the Manifest node and looking for all of the lines similar to the following

.class extern forwarder System.Func`1
{
  .assembly extern mscorlib
}
.class extern forwarder System.Func`2
{
  .assembly extern mscorlib
}
.class extern forwarder System.Func`3
{
  .assembly extern mscorlib
}