Bouncy Castle Decryption in c# from private key and encrytedtext

Bouncy Castle Decryption in c# from private key and encrytedtext

Encrytped text is:
wMXLjsRSfO1VngHqotJXoxygP1eTktr3gc3tuhdzXpqOy1N1V8/wflJuHkn1PX7Rf3/ccvL5vzPYYaKIm3s4IMhshrwVH3p4euprwRyNTvlBPLLmZ/b/wuTXkKqRdK81V9oHocIfxerivS4oIJfA4J6fMbtKom6IoE4GVhiAsJs=
My Private Key is:
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
I am using Bouncy Castle in c# , when i decrypt using the encrytedtext and
private key using below code:
keyPair = (AsymmetricCipherKeyPair)new PemReader(reader).ReadObject();
IAsymmetricBlockCipher cipher = new RsaEngine();
RsaKeyParameters privateKey = (RsaKeyParameters)keyPair.Private;
cipher.Init(false, keyPair.Private);
byte[] deciphered = cipher.ProcessBlock(bytesl, 0, bytesl.Length);
string decipheredText = utf8enc.GetString(deciphered);
I am getting decipheredText as
☻¢À?????U??`?u????|???^H?|???☺????♦M>?¡æ?&¡ê.0p?J??a?¡å?S¡ç$*▬T☼?
xQ??-??Ai9;??siqD??_??? ¢¾¡é¡×?k?Ny??kr?U??¡êz Mazher Ul Haq
but my actual string was "Mazher Ul Haq" , How to get actual string