diff --git a/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/CountersWidgetInputDto.cs b/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/CountersWidgetInputDto.cs
index d7c6dfc53c..8296a58556 100644
--- a/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/CountersWidgetInputDto.cs
+++ b/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/CountersWidgetInputDto.cs
@@ -2,7 +2,10 @@
 
 namespace DashboardDemo
 {
-    public class CountersWidgetInputDto : WidgetFilter
+    public class CountersWidgetInputDto
     {
+        public DateTime StartDate { get; set; }
+
+        public DateTime EndDate { get; set; }
     }
 }
\ No newline at end of file
diff --git a/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/IDashboardAppService.cs b/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/IDashboardAppService.cs
index 4cbf32a1d4..c77bacfcfd 100644
--- a/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/IDashboardAppService.cs
+++ b/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/IDashboardAppService.cs
@@ -7,7 +7,7 @@ namespace DashboardDemo
     {
         Task<CountersWidgetResultDto> GetCountersWidgetAsync(CountersWidgetInputDto input);
 
-        Task<NewUserStatistiWidgetResultDto> GetNewUserStatisticWidgetAsync(NewUserStatisticWidgetInputDto input);
+        Task<NewUserStatisticWidgetResultDto> GetNewUserStatisticWidgetAsync(NewUserStatisticWidgetInputDto input);
 
         Task<LicenseStatistiWidgetResultDto> GetLicenseStatisticWidgetAsync(LicenseStatisticWidgetInputDto input);
     }
diff --git a/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/LicenseStatisticWidgetInputDto.cs b/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/LicenseStatisticWidgetInputDto.cs
index 96903da718..036405d6b0 100644
--- a/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/LicenseStatisticWidgetInputDto.cs
+++ b/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/LicenseStatisticWidgetInputDto.cs
@@ -1,6 +1,11 @@
-namespace DashboardDemo
+using System;
+
+namespace DashboardDemo
 {
-    public class LicenseStatisticWidgetInputDto : WidgetFilter
+    public class LicenseStatisticWidgetInputDto
     {
+        public DateTime StartDate { get; set; }
+
+        public DateTime EndDate { get; set; }
     }
 }
\ No newline at end of file
diff --git a/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/NewUserStatisticWidgetInputDto.cs b/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/NewUserStatisticWidgetInputDto.cs
index fda641cd11..3c17a4ece6 100644
--- a/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/NewUserStatisticWidgetInputDto.cs
+++ b/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/NewUserStatisticWidgetInputDto.cs
@@ -2,8 +2,12 @@
 
 namespace DashboardDemo
 {
-    public class NewUserStatisticWidgetInputDto : WidgetFilter
+    public class NewUserStatisticWidgetInputDto
     {
+        public DateTime StartDate { get; set; }
+
+        public DateTime EndDate { get; set; }
+
         public NewUserStatisticFrequency Frequency { get; set; } = NewUserStatisticFrequency.Daily;
     }
 }
\ No newline at end of file
diff --git a/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/NewUserStatistiWidgetResultDto.cs b/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/NewUserStatisticWidgetResultDto.cs
similarity index 72%
rename from samples/DashboardDemo/src/DashboardDemo.Application.Contracts/NewUserStatistiWidgetResultDto.cs
rename to samples/DashboardDemo/src/DashboardDemo.Application.Contracts/NewUserStatisticWidgetResultDto.cs
index cb409a2be4..12510d2827 100644
--- a/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/NewUserStatistiWidgetResultDto.cs
+++ b/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/NewUserStatisticWidgetResultDto.cs
@@ -2,7 +2,7 @@
 
 namespace DashboardDemo
 {
-    public class NewUserStatistiWidgetResultDto
+    public class NewUserStatisticWidgetResultDto
     {
         public Dictionary<string, int> Data { get; set; }
     }
diff --git a/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/WidgetFilter.cs b/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/WidgetFilter.cs
deleted file mode 100644
index 203b100573..0000000000
--- a/samples/DashboardDemo/src/DashboardDemo.Application.Contracts/WidgetFilter.cs
+++ /dev/null
@@ -1,10 +0,0 @@
-using System;
-namespace DashboardDemo
-{
-    public class WidgetFilter
-    {
-        public DateTime StartDate { get; set; }
-
-        public DateTime EndDate { get; set; }
-    }
-}
diff --git a/samples/DashboardDemo/src/DashboardDemo.Application/DashboardAppService.cs b/samples/DashboardDemo/src/DashboardDemo.Application/DashboardAppService.cs
index fa2c0202fa..d97bd55321 100644
--- a/samples/DashboardDemo/src/DashboardDemo.Application/DashboardAppService.cs
+++ b/samples/DashboardDemo/src/DashboardDemo.Application/DashboardAppService.cs
@@ -23,7 +23,7 @@ namespace DashboardDemo
             };
         }
 
-        public async Task<NewUserStatistiWidgetResultDto> GetNewUserStatisticWidgetAsync(NewUserStatisticWidgetInputDto input)
+        public async Task<NewUserStatisticWidgetResultDto> GetNewUserStatisticWidgetAsync(NewUserStatisticWidgetInputDto input)
         {
             switch (input.Frequency)
             {
@@ -50,7 +50,7 @@ namespace DashboardDemo
             return new LicenseStatistiWidgetResultDto(){Data = data};
         }
 
-        private async Task<NewUserStatistiWidgetResultDto> GetMonthlyNewUserStatisticWidgetAsync(NewUserStatisticWidgetInputDto input)
+        private async Task<NewUserStatisticWidgetResultDto> GetMonthlyNewUserStatisticWidgetAsync(NewUserStatisticWidgetInputDto input)
         {
             DateTime endDate = input.EndDate;
             DateTime startDate = input.StartDate;
@@ -74,13 +74,13 @@ namespace DashboardDemo
                 data.Add(labels[i], new Random().Next(1500, 3000));
             }
 
-            return new NewUserStatistiWidgetResultDto()
+            return new NewUserStatisticWidgetResultDto()
             {
                 Data = data
             };
         }
 
-        private async Task<NewUserStatistiWidgetResultDto> GetDailyNewUserStatisticWidgetAsync(NewUserStatisticWidgetInputDto input)
+        private async Task<NewUserStatisticWidgetResultDto> GetDailyNewUserStatisticWidgetAsync(NewUserStatisticWidgetInputDto input)
         {
             var dayCount = (input.EndDate - input.StartDate).Days + 1;
 
@@ -98,7 +98,7 @@ namespace DashboardDemo
                 data.Add(labels[i], new Random().Next(50, 100));
             }
 
-            return new NewUserStatistiWidgetResultDto()
+            return new NewUserStatisticWidgetResultDto()
             {
                 Data = data
             };