diff --git a/samples/ASP.NET Core 3/BasePathStrategySample/Startup.cs b/samples/ASP.NET Core 3/BasePathStrategySample/Startup.cs
index 3d278a8f..ed8bfdc6 100644
--- a/samples/ASP.NET Core 3/BasePathStrategySample/Startup.cs	
+++ b/samples/ASP.NET Core 3/BasePathStrategySample/Startup.cs	
@@ -28,7 +28,7 @@ public void ConfigureServices(IServiceCollection services)
 
         public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
         {
-            if (env.EnvironmentName == "Development")
+            if (env.IsDevelopment())
             {
                 app.UseDeveloperExceptionPage();
             }
diff --git a/samples/ASP.NET Core 3/DataIsolationSample/Startup.cs b/samples/ASP.NET Core 3/DataIsolationSample/Startup.cs
index 66c56bdc..7710b89a 100644
--- a/samples/ASP.NET Core 3/DataIsolationSample/Startup.cs	
+++ b/samples/ASP.NET Core 3/DataIsolationSample/Startup.cs	
@@ -35,7 +35,7 @@ public void ConfigureServices(IServiceCollection services)
 
         public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
         {
-            if (env.EnvironmentName == "Development")
+            if (env.IsDevelopment())
             {
                 app.UseDeveloperExceptionPage();
             }
diff --git a/samples/ASP.NET Core 3/DelegateStrategySample/Startup.cs b/samples/ASP.NET Core 3/DelegateStrategySample/Startup.cs
index 0ede6e96..eec7c380 100644
--- a/samples/ASP.NET Core 3/DelegateStrategySample/Startup.cs	
+++ b/samples/ASP.NET Core 3/DelegateStrategySample/Startup.cs	
@@ -36,7 +36,7 @@ public void ConfigureServices(IServiceCollection services)
 
         public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
         {
-            if (env.EnvironmentName == "Development")
+            if (env.IsDevelopment())
             {
                 app.UseDeveloperExceptionPage();
             }
diff --git a/samples/ASP.NET Core 3/EFCoreStoreSample/Startup.cs b/samples/ASP.NET Core 3/EFCoreStoreSample/Startup.cs
index 8faf46b0..f75cae51 100644
--- a/samples/ASP.NET Core 3/EFCoreStoreSample/Startup.cs	
+++ b/samples/ASP.NET Core 3/EFCoreStoreSample/Startup.cs	
@@ -31,7 +31,7 @@ public void ConfigureServices(IServiceCollection services)
 
         public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
         {
-            if (env.EnvironmentName == "Development")
+            if (env.IsDevelopment())
             {
                 app.UseDeveloperExceptionPage();
             }
diff --git a/samples/ASP.NET Core 3/HostStrategySample/Startup.cs b/samples/ASP.NET Core 3/HostStrategySample/Startup.cs
index b17a6c20..b5ae33fe 100644
--- a/samples/ASP.NET Core 3/HostStrategySample/Startup.cs	
+++ b/samples/ASP.NET Core 3/HostStrategySample/Startup.cs	
@@ -29,7 +29,7 @@ public void ConfigureServices(IServiceCollection services)
 
         public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
         {
-            if (env.EnvironmentName == "Development")
+            if (env.IsDevelopment())
             {
                 app.UseDeveloperExceptionPage();
             }
diff --git a/samples/ASP.NET Core 3/HttpRemoteStoreSample/HttpRemoteStoreSample/Startup.cs b/samples/ASP.NET Core 3/HttpRemoteStoreSample/HttpRemoteStoreSample/Startup.cs
index 301e76f4..0fa55faf 100644
--- a/samples/ASP.NET Core 3/HttpRemoteStoreSample/HttpRemoteStoreSample/Startup.cs	
+++ b/samples/ASP.NET Core 3/HttpRemoteStoreSample/HttpRemoteStoreSample/Startup.cs	
@@ -28,7 +28,7 @@ public void ConfigureServices(IServiceCollection services)
 
         public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
         {
-            if (env.EnvironmentName == "Development")
+            if (env.IsDevelopment())
             {
                 app.UseDeveloperExceptionPage();
             }
diff --git a/samples/ASP.NET Core 3/IdentityDataIsolationSample/Startup.cs b/samples/ASP.NET Core 3/IdentityDataIsolationSample/Startup.cs
index d241df20..dc4c9dbd 100644
--- a/samples/ASP.NET Core 3/IdentityDataIsolationSample/Startup.cs	
+++ b/samples/ASP.NET Core 3/IdentityDataIsolationSample/Startup.cs	
@@ -59,7 +59,7 @@ public void ConfigureServices(IServiceCollection services)
 
         public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
         {
-            if (env.EnvironmentName == "Development")
+            if (env.IsDevelopment())
             {
                 app.UseDeveloperExceptionPage();
                 app.UseStatusCodePages();
diff --git a/samples/ASP.NET Core 3/PerTenantAuthenticationSample/Startup.cs b/samples/ASP.NET Core 3/PerTenantAuthenticationSample/Startup.cs
index 48070367..b894afdd 100644
--- a/samples/ASP.NET Core 3/PerTenantAuthenticationSample/Startup.cs	
+++ b/samples/ASP.NET Core 3/PerTenantAuthenticationSample/Startup.cs	
@@ -42,7 +42,7 @@ public void ConfigureServices(IServiceCollection services)
 
         public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
         {
-            if (env.EnvironmentName == "Development")
+            if (env.IsDevelopment())
             {
                 app.UseDeveloperExceptionPage();
             }
diff --git a/samples/ASP.NET Core 3/RouteStrategySample/Startup.cs b/samples/ASP.NET Core 3/RouteStrategySample/Startup.cs
index 6ebb9340..d46e86a7 100644
--- a/samples/ASP.NET Core 3/RouteStrategySample/Startup.cs	
+++ b/samples/ASP.NET Core 3/RouteStrategySample/Startup.cs	
@@ -29,7 +29,7 @@ public void ConfigureServices(IServiceCollection services)
 
         public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
         {
-            if (env.EnvironmentName == "Development")
+            if (env.IsDevelopment())
             {
                 app.UseDeveloperExceptionPage();
             }
diff --git a/samples/ASP.NET Core 3/SessionStrategySample/Startup.cs b/samples/ASP.NET Core 3/SessionStrategySample/Startup.cs
index c59c4ee4..c1c5b079 100644
--- a/samples/ASP.NET Core 3/SessionStrategySample/Startup.cs	
+++ b/samples/ASP.NET Core 3/SessionStrategySample/Startup.cs	
@@ -35,7 +35,7 @@ public void ConfigureServices(IServiceCollection services)
 
         public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
         {
-            if (env.EnvironmentName == "Development")
+            if (env.IsDevelopment())
             {
                 app.UseDeveloperExceptionPage();
             }
diff --git a/samples/ASP.NET Core 3/StaticStrategySample/Startup.cs b/samples/ASP.NET Core 3/StaticStrategySample/Startup.cs
index 4b2a22f8..ed5d33d3 100644
--- a/samples/ASP.NET Core 3/StaticStrategySample/Startup.cs	
+++ b/samples/ASP.NET Core 3/StaticStrategySample/Startup.cs	
@@ -28,7 +28,7 @@ public void ConfigureServices(IServiceCollection services)
 
         public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
         {
-            if (env.EnvironmentName == "Development")
+            if (env.IsDevelopment())
             {
                 app.UseDeveloperExceptionPage();
             }