c# - Convert Base64 string to image and save it -

i want save base64 image folder in application, have problem in code. gives error below,

message = "invalid length base-64 char array or string."

in code;

public static string updateuser(int refuser, string name, string surname,string base64)         {             string result = "failed";             var photo = "";              if (base64!=null && base64!="")             {                   string mediapath = extend.getxmlconfigparameter("media", "path")+"user\\";                 string medianame = guid.newguid().tostring();                 base64 = base64.replace("data:image/png;base64,", "");                 base64 = base64.replace("data:image/jpg;base64,", "");                 base64 = base64.replace("data:image/gif;base64,", "");                 base64 = base64.replace("data:image/jpeg;base64,", "");                  string filepath = mediapath + medianame + ".png";                 try                 {                     byte[] bytes = convert.frombase64string(base64);                      image image;                     using (memorystream ms = new memorystream(bytes))                     {                         image = image.fromstream(ms);                     }                      image.save(filepath, system.drawing.imaging.imageformat.png);                     //file.writeallbytes(filepath, convert.frombase64string(base64));                     photo = medianame + ".png";                 }                 catch(exception ex)                 {                     logger.logerror(ex.message, ex.stacktrace);                     return result;                 }             }             try             {                 dataset ds = database.getdataset(con, database.createspquery("mobile_user_update ",                      new list<object> {                         refuser,                         name,                         surname,                         photo                      }));                 if (!database.isdatasetvalid(ds))                     return null;                 result = database.getstring(ds.tables[0].rows[0]["result"]);             }             catch (exception ex)             {                 logger.logerror(ex.message, ex.stacktrace);             }             return result;         } 

when try convert byte array below step in code

byte[] bytes = convert.frombase64string(base64); 

i take error. example base64 string is

data:image/png;base64,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

how can solve problem.

thanks in advance.

it looks getting base64 string through url. if so, should encode , before send client.

 httputility.urlencode(base64string)