.NET有丰富的加密解密API库供我们使用，本文章总结了.NET下的Hash散列算法，并制作成简单的DEMO，希望能对大家有所帮助。

using System;  
using System.Collections.Generic;  
using System.Text;  
  
using System.Security.Cryptography;  
  
namespace EncryptAndDecrypt  
{  
    public class MD5  
    {  
        public byte[] Hash(byte[] data)  
        {  
            System.Security.Cryptography.MD5 md5 = System.Security.Cryptography.MD5.Create();  
  
            return md5.ComputeHash(data);  
        }  
    }  
}  

SHA1

using System;  
using System.Collections.Generic;  
using System.Text;  
  
using System.Security.Cryptography;  
  
namespace EncryptAndDecrypt  
{  
    public class SHA1  
    {  
        public byte[] Hash(byte[] data)  
        {  
            System.Security.Cryptography.SHA1 sha1 = System.Security.Cryptography.SHA1.Create();  
            return sha1.ComputeHash(data);  
        }  
    }  
} 

SHA256

using System;  
using System.Collections.Generic;  
using System.Text;  
  
using System.Security.Cryptography;  
  
namespace EncryptAndDecrypt  
{  
    public class SHA256  
    {  
  
  
        public byte[] Hash(byte[] data)  
        {  
            System.Security.Cryptography.SHA256 sha256=  System.Security.Cryptography.SHA256.Create();  
            return sha256.ComputeHash(data);  
        }  
    }  
} 

using System;  
using System.Collections.Generic;  
using System.Text;  
  
using System.Security.Cryptography;  
namespace EncryptAndDecrypt  
{  
    public class SHA384  
    {  
  
        public byte[] Hash(byte[] data)  
        {  
            System.Security.Cryptography.SHA384 sha384 = System.Security.Cryptography.SHA384.Create();  
            return sha384.ComputeHash(data);  
        }  
    }  
}  

SHA512

using System;  
using System.Collections.Generic;  
using System.Text;  
  
using System.Security.Cryptography;  
  
namespace EncryptAndDecrypt  
{  
    public class SHA512  
    {  
  
        public byte[] Hash(byte[] data)  
        {  
            System.Security.Cryptography.SHA512 sha512 = System.Security.Cryptography.SHA512.Create();  
            return sha512.ComputeHash(data);  
        }  
    }  
}