Index: Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.CalculatedInput/WaternetCalculationException.cs
===================================================================
diff -u
--- Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.CalculatedInput/WaternetCalculationException.cs	(revision 0)
+++ Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.CalculatedInput/WaternetCalculationException.cs	(revision 7c01a77639cfd510d494ac41556a3c7a6735db8e)
@@ -0,0 +1,47 @@
+using System;
+using System.Runtime.Serialization;
+
+namespace Riskeer.MacroStabilityInwards.CalculatedInput
+{
+    /// <summary>
+    /// Exception thrown when something went wrong while performing the waternet calculation.
+    /// </summary>
+    [Serializable]
+    public class WaternetCalculationException : Exception
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="WaternetCalculationException"/> class.
+        /// </summary>
+        public WaternetCalculationException() {}
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="WaternetCalculationException"/> class 
+        /// with a specified error message.
+        /// </summary>
+        /// <param name="message">The message that describes the error.</param>
+        public WaternetCalculationException(string message)
+            : base(message) {}
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="WaternetCalculationException"/> class with a specified error message 
+        /// and a reference to the inner exception that is the cause of this exception.
+        /// </summary>
+        /// <param name="message">The error message that explains the reason for the exception.</param>
+        /// <param name="innerException">The exception that is the cause of the current exception,
+        /// or <c>null</c> if no inner exception is specified.</param>
+        public WaternetCalculationException(string message, Exception innerException) : base(message, innerException) {}
+
+        /// <summary>
+        /// Initializes a new instance of <see cref="WaternetCalculationException"/> with
+        /// serialized data.</summary>
+        /// <param name="info">The <see cref="SerializationInfo"/> that holds the serialized
+        /// object data about the exception being thrown.</param>
+        /// <param name="context">The <see cref="StreamingContext"/> that contains contextual
+        /// information about the source or destination.</param>
+        /// <exception cref="ArgumentNullException">The <paramref name="info"/> parameter is
+        /// <c>null</c>.</exception>
+        /// <exception cref="SerializationException">The class name is <c>null</c> or
+        /// <see cref="Exception.HResult" /> is zero (0).</exception>
+        protected WaternetCalculationException(SerializationInfo info, StreamingContext context) : base(info, context) {}
+    }
+}
\ No newline at end of file
Index: Riskeer/MacroStabilityInwards/test/Riskeer.MacroStabilityInwards.CalculatedInput.Test/WaternetCalculationExceptionTest.cs
===================================================================
diff -u
--- Riskeer/MacroStabilityInwards/test/Riskeer.MacroStabilityInwards.CalculatedInput.Test/WaternetCalculationExceptionTest.cs	(revision 0)
+++ Riskeer/MacroStabilityInwards/test/Riskeer.MacroStabilityInwards.CalculatedInput.Test/WaternetCalculationExceptionTest.cs	(revision 7c01a77639cfd510d494ac41556a3c7a6735db8e)
@@ -0,0 +1,10 @@
+using System;
+using Core.Common.TestUtil;
+using NUnit.Framework;
+
+namespace Riskeer.MacroStabilityInwards.CalculatedInput.Test
+{
+    [TestFixture]
+    public class WaternetCalculationExceptionTest :
+        CustomExceptionDesignGuidelinesTestFixture<WaternetCalculationException, Exception> {}
+}
\ No newline at end of file