Invalid compiler-generated .NET Class Name

Answer 1

C# source code can't contain names starting with <>. But CLR names have more freedom, so compilers (like the C# compiler and PostSharp) can generate such names. This is very useful because it ensures that the compiler-generated names will never clash with the names you use in your source code. You'll also see them generated by the C# compiler itself, e.g. for anonymous types or for the backing fields of auto properties.