Add project files.

src/modules/Elsa.Sql.PostgreSql/Elsa.Sql.PostgreSql.csproj

@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <Description>
+      Provides client implementations for interacting with PostgreSql databases.
+    </Description>
+    <PackageTags>elsa module activities sql postgresql</PackageTags>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Npgsql" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Elsa.Sql\Elsa.Sql.csproj" />
+  </ItemGroup>
+
+</Project>