diff --git a/pkg/codegen/dotnet/utilities.go b/pkg/codegen/dotnet/utilities.go
index 50b643bb7..af7353909 100644
--- a/pkg/codegen/dotnet/utilities.go
+++ b/pkg/codegen/dotnet/utilities.go
@@ -126,13 +126,13 @@ func getHelperMethodIfNeeded(functionName string) (string, bool) {
 	switch functionName {
 	case "filebase64":
 		return `private static string ReadFileBase64(string path) {
-		return Convert.ToBase64String(System.Text.UTF8.GetBytes(File.ReadAllText(path)))
+		return Convert.ToBase64String(Encoding.UTF8.GetBytes(File.ReadAllText(path)))
 	}`, true
 	case "filebase64sha256":
 		return `private static string ComputeFileBase64Sha256(string path) {
-		var fileData = System.Text.UTF8.GetBytes(File.ReadAllText(path))
-		var hashData = SHA256.Create().ComputeHash(fileData)
-		return Convert.ToBase64String(BitConverter.ToString(hashData).Replace("-","").ToLowerInvariant())
+		var fileData = Encoding.UTF8.GetBytes(File.ReadAllText(path));
+		var hashData = SHA256.Create().ComputeHash(fileData);
+		return Convert.ToBase64String(hashData);
 	}`, true
 	case "sha1":
 		return `private static string ComputeSHA1(string input) {