C#中判断某类型是否可以进行隐式类型转换

C#中，有些类型是可以隐式转换的，我整理了这些可以隐式转换的类型，供大家参考

     static private bool CanConvert(Type from, Type to)
    {
       if (from.IsPrimitive && to.IsPrimitive)
          {
   TypeCode typeCodeFrom = Type.GetTypeCode(from);
   TypeCode typeCodeTo = Type.GetTypeCode(to);
   if (typeCodeFrom == typeCodeTo)
   return true;
   if (typeCodeFrom == TypeCode.Char)
   switch (typeCodeTo)
   {
   case TypeCode.UInt16: return true;
   case TypeCode.UInt32: return true;
   case TypeCode.Int32: return true;
   case TypeCode.UInt64: return true;
   case TypeCode.Int64: return true;
   case TypeCode.Single: return true;
   case TypeCode.Double: return true;
   default: return false;
   }
   // Possible conversions from Byte follow.
   if (typeCodeFrom == TypeCode.Byte)
   switch (typeCodeTo)
   {
   case TypeCode.Char: return true;
   case TypeCode.UInt16: return true;
   case TypeCode.Int16: return true;
   case TypeCode.UInt32: return true;
   case TypeCode.Int32: return true;
   case TypeCode.UInt64: return true;
   case TypeCode.Int64: return true;
   case TypeCode.Single: return true;
   case TypeCode.Double: return true;
   default: return false;
   }
   // Possible conversions from SByte follow.
   if (typeCodeFrom == TypeCode.SByte)
   switch (typeCodeTo)
   {
   case TypeCode.Int16: return true;
   case TypeCode.Int32: return true;
   case TypeCode.Int64: return true;
   case TypeCode.Single: return true;
   case TypeCode.Double: return true;
   default: return false;
   }
   // Possible conversions from UInt16 follow.  "sp; case TypeCode.Double: return true;
   default: return false;
   }
   // Possible conversions from Single follow.
   if (typeCodeFrom == TypeCode.Single)
   switch (typeCodeTo)
   {
   case TypeCode.Double: return true;
   default: return false;
   }
   }
   return false;
   }