Determining whether a Type is an Anonymous Type [duplicate]

Answer 1

There is no C# language construct which allows you to say "Is this an anonymous type". You can use a simple heuristic to approximate if a type is an anonymous type, but it's possible to get tricked by people hand coding IL, or using a language where such characters as > and < are valid in identifiers.

public static class TypeExtensions {
  public static bool IsAnonymousType(this Type t) {
    var name = t.Name;
    if ( name.Length < 3 ) {
      return false;
    }
    return name[0] == '<' 
        && name[1] == '>' 
        && name.IndexOf("AnonymousType", StringComparison.Ordinal) > 0;
}