Update Sample5_SignVerify.md (Azure#18590)

* Update Sample5_SignVerify.md

Renamed variabled `rsaKey` and `ecKey` to `...KeyOptions`, to better illustrate that the object does not hold the key but the config options that tell the `keyClient` how to create the new key.

* Rename variables to better illustrate the actual referenced objects

Rename variable `rsaKey` to `rsaKeyOptions` since that object does not hold the key but the options which tell the keyClient how to create the new RSA key. Rename `cloudRsaKey` to `rsaKey` since that variable contains a reference to a key object. Both changes analogous for EC keys.

* Update Sample5_SignVerify.md

Co-authored-by: Heath Stewart <heaths@microsoft.com>

Author: LWChris

sdk/keyvault/Azure.Security.KeyVault.Keys/samples/Sample5_SignVerify.md

@@ -20,32 +20,32 @@ First, we'll create both an RSA key and an EC key which will be used to sign and
 
 ```C# Snippet:KeysSample5CreateKey
 string rsaKeyName = $"CloudRsaKey-{Guid.NewGuid()}";
-var rsaKey = new CreateRsaKeyOptions(rsaKeyName, hardwareProtected: false)
+var rsaKeyOptions = new CreateRsaKeyOptions(rsaKeyName, hardwareProtected: false)
 {
     KeySize = 2048,
 };
 
 string ecKeyName = $"CloudEcKey-{Guid.NewGuid()}";
-var ecKey = new CreateEcKeyOptions(ecKeyName, hardwareProtected: false)
+var ecKeyOptions = new CreateEcKeyOptions(ecKeyName, hardwareProtected: false)
 {
     CurveName = KeyCurveName.P256K,
 };
 
-KeyVaultKey cloudRsaKey = keyClient.CreateRsaKey(rsaKey);
-Debug.WriteLine($"Key is returned with name {cloudRsaKey.Name} and type {cloudRsaKey.KeyType}");
+KeyVaultKey rsaKey = keyClient.CreateRsaKey(rsaKeyOptions);
+Debug.WriteLine($"Key is returned with name {rsaKey.Name} and type {rsaKey.KeyType}");
 
-KeyVaultKey cloudEcKey = keyClient.CreateEcKey(ecKey);
-Debug.WriteLine($"Key is returned with name {cloudEcKey.Name} and type {cloudEcKey.KeyType}");
+KeyVaultKey ecKey = keyClient.CreateEcKey(ecKeyOptions);
+Debug.WriteLine($"Key is returned with name {ecKey.Name} and type {ecKey.KeyType}");
 ```
 
 ## Creating CryptographyClients
 
 Then, we create the `CryptographyClient` which can perform cryptographic operations with the key we just created using the same credential created above.
 
 ```C# Snippet:KeysSample5CryptographyClient
-var rsaCryptoClient = new CryptographyClient(cloudRsaKey.Id, new DefaultAzureCredential());
+var rsaCryptoClient = new CryptographyClient(rsaKey.Id, new DefaultAzureCredential());
 
-var ecCryptoClient = new CryptographyClient(cloudEcKey.Id, new DefaultAzureCredential());
+var ecCryptoClient = new CryptographyClient(ecKey.Id, new DefaultAzureCredential());
 ```
 
 ## Signing keys with the Sign and Verify methods

sdk/keyvault/Azure.Security.KeyVault.Keys/tests/samples/Sample5_SignVerify.cs

@@ -34,28 +34,28 @@ public void SignVerifySync()
 
 #region Snippet:KeysSample5CreateKey
             string rsaKeyName = $"CloudRsaKey-{Guid.NewGuid()}";
-            var rsaKey = new CreateRsaKeyOptions(rsaKeyName, hardwareProtected: false)
+            var rsaKeyOptions = new CreateRsaKeyOptions(rsaKeyName, hardwareProtected: false)
             {
                 KeySize = 2048,
             };
 
             string ecKeyName = $"CloudEcKey-{Guid.NewGuid()}";
-            var ecKey = new CreateEcKeyOptions(ecKeyName, hardwareProtected: false)
+            var ecKeyOptions = new CreateEcKeyOptions(ecKeyName, hardwareProtected: false)
             {
                 CurveName = KeyCurveName.P256K,
             };
 
-            KeyVaultKey cloudRsaKey = keyClient.CreateRsaKey(rsaKey);
-            Debug.WriteLine($"Key is returned with name {cloudRsaKey.Name} and type {cloudRsaKey.KeyType}");
+            KeyVaultKey rsaKey = keyClient.CreateRsaKey(rsaKeyOptions);
+            Debug.WriteLine($"Key is returned with name {rsaKey.Name} and type {rsaKey.KeyType}");
 
-            KeyVaultKey cloudEcKey = keyClient.CreateEcKey(ecKey);
-            Debug.WriteLine($"Key is returned with name {cloudEcKey.Name} and type {cloudEcKey.KeyType}");
+            KeyVaultKey ecKey = keyClient.CreateEcKey(ecKeyOptions);
+            Debug.WriteLine($"Key is returned with name {ecKey.Name} and type {ecKey.KeyType}");
 #endregion
 
 #region Snippet:KeysSample5CryptographyClient
-            var rsaCryptoClient = new CryptographyClient(cloudRsaKey.Id, new DefaultAzureCredential());
+            var rsaCryptoClient = new CryptographyClient(rsaKey.Id, new DefaultAzureCredential());
 
-            var ecCryptoClient = new CryptographyClient(cloudEcKey.Id, new DefaultAzureCredential());
+            var ecCryptoClient = new CryptographyClient(ecKey.Id, new DefaultAzureCredential());
 #endregion
 
 #region Snippet:KeysSample5SignKey