人生是一场不能存盘的RPG,我只能尽量多搞几个Screenshot

方法1.

引用自http://lozanotek.com/archive/2004/11/15/159.aspx

private const int COR_E_ASSEMBLYEXPECTED = -2147024885;
private bool IsAssembly(string asmFile)
{
    bool isAsmbly = true;
    try
    {
         AssemblyName.GetAssemblyName(asmFile);
    }
    catch(BadImageFormatException imageEx)
    {
         int hrResult = Marshal.GetHRForException(imageEx);
         isAsmbly = (hrResult != COR_E_ASSEMBLYEXPECTED);
    }

    return isAsmbly;
}
方法2.运用PE格式的知识,佩服.

出自http://geekswithblogs.net/rupreet/archive/2005/11/02/58873.aspx

  public static bool GetCLRHeaders(string fileFullName)
        {
            uint peHeader;
            uint peHeaderSignature;
            ushort machine;
            ushort sections;
            uint timestamp;
            uint pSymbolTable;
            uint noOfSymbol;
            ushort optionalHeaderSize;
            ushort characteristics;
            ushort dataDictionaryStart;
            uint[] dataDictionaryRVA = new uint[16];
            uint[] dataDictionarySize = new uint[16];

            Stream fs = new FileStream(fileFullName, FileMode.Open, FileAccess.Read);
            try
            {
                BinaryReader reader = new BinaryReader(fs);

                //PE Header starts @ 0x3C (60). Its a 4 byte header.
                fs.Position = 0x3C;
                peHeader = reader.ReadUInt32();

                //Moving to PE Header start location…
                fs.Position = peHeader;
                peHeaderSignature = reader.ReadUInt32();

                //We can also show all these value, but we will be      
                //limiting to the CLI header test.
                machine = reader.ReadUInt16();
                sections = reader.ReadUInt16();
                timestamp = reader.ReadUInt32();
                pSymbolTable = reader.ReadUInt32();
                noOfSymbol = reader.ReadUInt32();
                optionalHeaderSize = reader.ReadUInt16();
                characteristics = reader.ReadUInt16();
                /*
                    Now we are at the end of the PE Header and from here, the
                    PE Optional Headers starts…
                    To go directly to the datadictionary, we’ll increase the
                    stream’s current position to with 96 (0x60). 96 because,
                    28 for Standard fields
                    68 for NT-specific fields

                    From here DataDictionary starts…and its of total 128 bytes. DataDictionay has 16 directories in total,
                    doing simple maths 128/16 = 8.
                    So each directory is of 8 bytes.
                    In this 8 bytes, 4 bytes is of RVA and 4 bytes of Size.
                    btw, the 15th directory consist of CLR header! if its 0, its not a CLR file
                  */

                dataDictionaryStart = Convert.ToUInt16(Convert.ToUInt16(fs.Position) + 0x60);
                fs.Position = dataDictionaryStart;
                for (int i = 0; i < 15; i++)
                {
                    dataDictionaryRVA[i] = reader.ReadUInt32();
                    dataDictionarySize[i] = reader.ReadUInt32();
                }
                return dataDictionaryRVA[14] != 0;
            }
            finally
            {
                fs.Close();
            }
        }