C# Decrypt string using 3DES (Triple Data Encription Standard) algorithm

We have a third party application which sends encrypted data using 3DES (Triple Data Encryption Standard) algorithm.

Third party application sends below encrypted string

WCgsTFmwAdy0OSVx57LqI/MFjrAdcn95QcbkzjuuqgY60avU+/O4R134j8LJ7/dm

for original string This is string value and key is KeyValue

I am trying to Decrypt data using below Decrypt function.

explained here How to implement Triple DES in C# (complete example)

i have tried CipherMode & PaddingMode combinations to find out used CipherMode & PaddingMode but no luck, its returning garbage values.

How can i Decrypt above data using perfect algorithm or identify Encryption algorithm.

string[] modes = Enum.GetNames(typeof(CipherMode));
string[] paddings = Enum.GetNames(typeof(PaddingMode));

foreach (string mode in modes)
{
    foreach (string pad in paddings)
    {
        try
        {

            string decryptstr = Decrypt("WCgsTFmwAdy0OSVx57LqI/MFjrAdcn95QcbkzjuuqgY60avU+/O4R134j8LJ7/dm",true, "KeyValue",(CipherMode)Enum.Parse(typeof(CipherMode),mode), (PaddingMode)Enum.Parse(typeof(PaddingMode), pad));
            Console.WriteLine(decryptstr);
        }
        catch
        {

        }
    }    
}


public static string Decrypt(string cipherString, bool useHashing, string key, CipherMode mode, PaddingMode paddingmode)
{
    byte[] keyArray;
    //get the byte code of the string

    byte[] toEncryptArray = Convert.FromBase64String(cipherString);




    if (useHashing)
    {
        //if hashing was used get the hash code with regards to your key
        MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
        keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
        //release any resource held by the MD5CryptoServiceProvider

        hashmd5.Clear();
    }
    else
    {
        //if hashing was not implemented get the byte code of the key
        keyArray = UTF8Encoding.UTF8.GetBytes(key);
    }

    TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
    //set the secret key for the tripleDES algorithm
    tdes.Key = keyArray;
    //mode of operation. there are other 4 modes. 
    //We choose ECB(Electronic code Book)

    tdes.Mode = mode;// CipherMode.ECB;
    //padding mode(if any extra byte added)
    tdes.Padding = paddingmode;//; PaddingMode.PKCS7;

    ICryptoTransform cTransform = tdes.CreateDecryptor();
    byte[] resultArray = cTransform.TransformFinalBlock(
                         toEncryptArray, 0, toEncryptArray.Length);
    //Release resources held by TripleDes Encryptor                
    tdes.Clear();
    //return the Clear decrypted TEXT
    return UTF8Encoding.UTF8.GetString(resultArray);
}