Update DatabaseManagementSystemChangeStep.cs

framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/ProjectBuilding/Building/Steps/DatabaseManagementSystemChangeStep.cs

@@ -91,12 +91,17 @@ public class DatabaseManagementSystemChangeStep : ProjectBuildPipelineStep
 
     private void ChangeUseSqlServer(ProjectBuildContext context, string newUseMethodForEfModule, string newUseMethodForDbContext = null)
     {
-        if (newUseMethodForDbContext == null)
+        var oldUseMethod = "UseSqlServer";
+
+        if (newUseMethodForEfModule.IsNullOrWhiteSpace())
         {
-            newUseMethodForDbContext = newUseMethodForEfModule;
+            newUseMethodForEfModule = oldUseMethod;
         }
 
-        var oldUseMethod = "UseSqlServer";
+        if (newUseMethodForDbContext.IsNullOrWhiteSpace())
+        {
+            newUseMethodForDbContext = newUseMethodForEfModule;
+        }
 
         var efCoreModuleClass = context.Files.First(f => f.Name.EndsWith("EntityFrameworkCoreModule.cs", StringComparison.OrdinalIgnoreCase));
         efCoreModuleClass.ReplaceText(oldUseMethod, newUseMethodForEfModule);