From 8457c32a01cd456cc019c4049777fe0b3da8eb6a Mon Sep 17 00:00:00 2001
From: Alex Zaytsev <hazzik@gmail.com>
Date: Sun, 16 May 2021 05:47:28 +0300
Subject: [PATCH] Fix AmbiguousMatchException in ClearPool with FirebirdClient
 6.6.0 and above (#2758)

(cherry picked from commit 2b8dd9be20e3f35a4e609f1f41e6333bcf36501e)
---
 src/NHibernate.Test/NHibernate.Test.csproj    | 2 +-
 src/NHibernate/Driver/FirebirdClientDriver.cs | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/NHibernate.Test/NHibernate.Test.csproj b/src/NHibernate.Test/NHibernate.Test.csproj
index 061199e776f..84d9e58e8ef 100644
--- a/src/NHibernate.Test/NHibernate.Test.csproj
+++ b/src/NHibernate.Test/NHibernate.Test.csproj
@@ -63,7 +63,7 @@
     <PackageReference Include="NUnit" Version="3.12.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.13.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.1.1" />
-    <PackageReference Include="FirebirdSql.Data.FirebirdClient" Version="6.3.0" />
+    <PackageReference Include="FirebirdSql.Data.FirebirdClient" Version="6.6.0" />
     <PackageReference Include="Npgsql" Version="4.0.3" />
   </ItemGroup>
   <ItemGroup Condition="$(NhNetFx)">
diff --git a/src/NHibernate/Driver/FirebirdClientDriver.cs b/src/NHibernate/Driver/FirebirdClientDriver.cs
index 2cfa6bd448d..e2859880adb 100644
--- a/src/NHibernate/Driver/FirebirdClientDriver.cs
+++ b/src/NHibernate/Driver/FirebirdClientDriver.cs
@@ -160,8 +160,8 @@ public void ClearPool(string connectionString)
 				using (var clearConnection = CreateConnection())
 				{
 					var connectionType = clearConnection.GetType();
-					_clearPool = connectionType.GetMethod("ClearPool") ?? throw new InvalidOperationException("Unable to resolve ClearPool method.");
-					_clearAllPools = connectionType.GetMethod("ClearAllPools") ?? throw new InvalidOperationException("Unable to resolve ClearAllPools method.");
+					_clearPool = connectionType.GetMethod("ClearPool", new[] { connectionType }) ?? throw new InvalidOperationException("Unable to resolve ClearPool method.");
+					_clearAllPools = connectionType.GetMethod("ClearAllPools", Array.Empty<System.Type>()) ?? throw new InvalidOperationException("Unable to resolve ClearAllPools method.");
 				}
 			}