diff --git a/Cop.Borovkov.Var3/Cop.Borovkov.Var3/Components/CustomNumericInputField.cs b/Cop.Borovkov.Var3/Cop.Borovkov.Var3/Components/CustomNumericInputField.cs
index e239e30..8609454 100644
--- a/Cop.Borovkov.Var3/Cop.Borovkov.Var3/Components/CustomNumericInputField.cs
+++ b/Cop.Borovkov.Var3/Cop.Borovkov.Var3/Components/CustomNumericInputField.cs
@@ -1,4 +1,6 @@
-namespace Cop.Borovkov.Var3.Components
+using Cop.Borovkov.Var3.Exceptions;
+
+namespace Cop.Borovkov.Var3.Components
 {
     public partial class CustomNumericInputField : UserControl
     {
@@ -48,7 +50,7 @@
                     return value;
                 }
 
-                throw new InvalidOperationException();
+                throw new InvalidNumericInputValueException();
             }
             set
             {
diff --git a/Cop.Borovkov.Var3/Cop.Borovkov.Var3/Cop.Borovkov.Var3.csproj b/Cop.Borovkov.Var3/Cop.Borovkov.Var3/Cop.Borovkov.Var3.csproj
index cd9d366..3e210aa 100644
--- a/Cop.Borovkov.Var3/Cop.Borovkov.Var3/Cop.Borovkov.Var3.csproj
+++ b/Cop.Borovkov.Var3/Cop.Borovkov.Var3/Cop.Borovkov.Var3.csproj
@@ -7,8 +7,4 @@
     <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
 
-  <ItemGroup>
-    <Folder Include="Exceptions\" />
-  </ItemGroup>
-
 </Project>
diff --git a/Cop.Borovkov.Var3/Cop.Borovkov.Var3/Exceptions/InvalidNumericInputValueException.cs b/Cop.Borovkov.Var3/Cop.Borovkov.Var3/Exceptions/InvalidNumericInputValueException.cs
new file mode 100644
index 0000000..bb2cc1d
--- /dev/null
+++ b/Cop.Borovkov.Var3/Cop.Borovkov.Var3/Exceptions/InvalidNumericInputValueException.cs
@@ -0,0 +1,9 @@
+namespace Cop.Borovkov.Var3.Exceptions
+{
+    public class InvalidNumericInputValueException : Exception
+    {
+        public InvalidNumericInputValueException() { }
+
+        public InvalidNumericInputValueException(string message) : base(message) { }
+    }
+}