Update quick start docs

src/Quickstart/EncryptionKeyParameters.cs

@@ -4,6 +4,9 @@
 
 namespace Quickstart
 {
+    /// <summary>
+    /// Represents the standard parameters of RSA algorithm
+    /// </summary>
     public struct EncryptionKeyParameters
     {
         public byte[] E;

src/Quickstart/EncryptionKeyUtility.cs

@@ -8,17 +8,31 @@
 
 namespace Quickstart
 {
+    /// <summary>
+    /// Provides utilities for serialization of an RSA key parameters
+    /// </summary>
     public static class EncryptionKeyUtility
     {
+        /// <summary>
+        /// Serializes parameters of an RSA key in PEM format to JSON
+        /// </summary>
+        /// <param name="key">RSA private key in PEM format</param>
+        /// <returns>JSON string representing RSA parameters of the <paramref name="key"/></returns>
         public static string SerializeRsaParameters(string key)
         {
             PemReader pemReader = new PemReader(new StringReader(key));
-            AsymmetricCipherKeyPair keyPair = (AsymmetricCipherKeyPair)pemReader.ReadObject();
+            AsymmetricCipherKeyPair keyPair = (AsymmetricCipherKeyPair) pemReader.ReadObject();
             RSAParameters parameters = DotNetUtilities.ToRSAParameters(keyPair.Private as RsaPrivateCrtKeyParameters);
-            return JsonConvert.SerializeObject((EncryptionKeyParameters)parameters);
+            return JsonConvert.SerializeObject((EncryptionKeyParameters) parameters);
         }
 
+        /// <summary>
+        /// Creates an instance of <see cref="RSA"/> from key parameters serialized in JSON.
+        /// Use <see cref="SerializeRsaParameters"/> method to generate the expected JSON string.
+        /// </summary>
+        /// <param name="json">JSON-serialized RSA key parameters</param>
+        /// <returns>Created RSA instance representing the encryption key</returns>
         public static RSA GetRsaKeyFromJson(string json) =>
-            RSA.Create((RSAParameters)JsonConvert.DeserializeObject<EncryptionKeyParameters>(json));
+            RSA.Create((RSAParameters) JsonConvert.DeserializeObject<EncryptionKeyParameters>(json));
     }
 }