diff --git a/src/guide/buy_btc.md b/src/guide/buy_btc.md
index c984ceb..f55064e 100644
--- a/src/guide/buy_btc.md
+++ b/src/guide/buy_btc.md
@@ -92,7 +92,15 @@ buyBitcoinResponse, err := sdkService.BuyBitcoin(breez_sdk.BuyBitcoinRequest{
 <section>
 
 ```cs
-// TODO add docs
+try
+{
+    var buyBitcoinResponse = sdk.BuyBitcoin(
+        new BuyBitcoinRequest(BuyBitcoinProvider.MOONPAY));
+}
+catch (Exception)
+{
+    // Handle error
+}
 ```
 </section>
 </custom-tabs>
\ No newline at end of file
diff --git a/src/guide/lnurl_withdraw.md b/src/guide/lnurl_withdraw.md
index e39a71c..76e305f 100644
--- a/src/guide/lnurl_withdraw.md
+++ b/src/guide/lnurl_withdraw.md
@@ -155,7 +155,6 @@ var lnurlWithdrawUrl = "lnurl1dp68gurn8ghj7mr0vdskc6r0wd6z7mrww4exctthd96xserjv9
 
 try 
 {
-    var lnurlWithdrawUrl = "";
     var input = BreezSdkMethods.ParseInput(lnurlWithdrawUrl);
     if (input is InputType.LnUrlWithdraw lnurlw) 
     {
diff --git a/src/guide/payments.md b/src/guide/payments.md
index 19a58f0..e599797 100644
--- a/src/guide/payments.md
+++ b/src/guide/payments.md
@@ -114,7 +114,8 @@ invoice, err := sdkService.ReceivePayment(breez_sdk.ReceivePaymentRequest{
 ```cs
 try 
 {
-    var invoice = sdk.ReceivePayment(3000, "Invoice for 3000 sats");
+    var invoice = sdk.ReceivePayment(
+        new ReceivePaymentRequest(3000, "Invoice for 3000 sats"));
 } 
 catch (Exception) 
 {
@@ -220,7 +221,7 @@ payment, err := sdkServices.SendPayment(bolt11, 3000)
 <section>
 
 ```cs
-const bolt11 = "...";
+var bolt11 = "...";
 try 
 {
     var payment = sdk.SendPayment(bolt11, 3000);
@@ -325,7 +326,7 @@ payment, err := sdkServices.SendSpontaneousPayment(nodeId, 3000)
 <section>
 
 ```cs
-const nodeId = "...";
+var nodeId = "...";
 try 
 {
     var payment = sdk.SendSpontaneousPayment(nodeId, 3000);
diff --git a/src/guide/receive_onchain.md b/src/guide/receive_onchain.md
index abc8b74..7fd0f12 100644
--- a/src/guide/receive_onchain.md
+++ b/src/guide/receive_onchain.md
@@ -109,11 +109,7 @@ if swapInfo, err := sdkServices.ReceiveOnchain(breez_sdk.ReceiveOnchainRequest{}
 ```cs
 try 
 {
-    // Optional user-selected dynamic fees (see Connecting to LSP section for details)
-    var openingFeeParams = null;
-    var request = new ReceiveOnchainRequest(openingFeeParams);
-
-    var swapInfo = sdk.ReceiveOnchain(request);
+    var swapInfo = sdk.ReceiveOnchain(new ReceiveOnchainRequest());
 
     // Send your funds to the below bitcoin address
     var address = swapInfo.bitcoinAddress;
diff --git a/src/guide/send_onchain.md b/src/guide/send_onchain.md
index ee261ab..339e8d2 100644
--- a/src/guide/send_onchain.md
+++ b/src/guide/send_onchain.md
@@ -105,7 +105,8 @@ if currentFees, err := sdkServices.FetchReverseSwapFees(ReverseSwapFeesRequest(5
 ```cs
 try
 {
-    var currentFees = sdk.FetchReverseSwapFees(ReverseSwapFeesRequest(50000));
+    var currentFees = sdk.FetchReverseSwapFees(
+        new ReverseSwapFeesRequest(50000));
     Console.WriteLine($"Total estimated fees for reverse swap: {currentFees.totalEstimatedFees}");
 }
 catch (Exception)
@@ -321,7 +322,8 @@ var amountSat = currentFees.min;
 var satPerVbyte = <fee rate>;
 try 
 {
-    var reverseSwapInfo = sdk.SendOnchain(amountSat, destinationAddress, currentFees.feesHash, satPerVbyte);
+    var reverseSwapInfo = sdk.SendOnchain(
+        amountSat, destinationAddress, currentFees.feesHash, satPerVbyte);
 } 
 catch (Exception) 
 {
@@ -437,7 +439,7 @@ try
 catch (Exception) 
 {
     // Handle error
-}
+}   
 ```
 </section>
 </custom-tabs>