diff --git a/dotnet/IEC61850forCSharp/MmsValue.cs b/dotnet/IEC61850forCSharp/MmsValue.cs
index d4e84436..1a9d1b6d 100644
--- a/dotnet/IEC61850forCSharp/MmsValue.cs
+++ b/dotnet/IEC61850forCSharp/MmsValue.cs
@@ -44,9 +44,15 @@ namespace IEC61850
 			[DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
 			static extern float MmsValue_toFloat (IntPtr self);
 
+			[DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+			static extern void MmsValue_setFloat (IntPtr self, float value);
+
 			[DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
 			static extern double MmsValue_toDouble (IntPtr self);
 
+			[DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+			static extern void MmsValue_setDouble (IntPtr self, double newFloatValue);
+
 			[DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
             [return: MarshalAs(UnmanagedType.I1)]
 			static extern bool MmsValue_getBoolean (IntPtr self);
@@ -91,6 +97,9 @@ namespace IEC61850
 			[DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
 			static extern ulong MmsValue_getUtcTimeInMs (IntPtr self);
 
+            [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+			static extern void MmsValue_setUtcTimeMs (IntPtr self, ulong timeval);
+
 			[DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
 			static extern ulong MmsValue_getUtcTimeInMsWithUs(IntPtr self, [Out] uint usec);
 
@@ -146,13 +155,14 @@ namespace IEC61850
 			[DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
 			static extern void MmsValue_setBinaryTime (IntPtr self, UInt64 timestamp);
 
-
-			internal MmsValue (IntPtr value)
+			// TODO make internal
+			public MmsValue (IntPtr value)
 			{
 				valueReference = value;
 				this.responsableForDeletion = false;
 			}
 
+			// TODO make internal
 			internal MmsValue (IntPtr value, bool responsableForDeletion)
 			{
 				valueReference = value;
@@ -395,6 +405,22 @@ namespace IEC61850
 					throw new MmsValueException ("Value is not a time type");
 			}
 
+			/// <summary>
+			/// Sets the timestamp value as UTC time in ms.
+			/// </summary>
+			/// <description>
+            /// Sets the value as milliseconds since epoch (1.1.1970 UTC).
+            /// The value has to be of type MMS_UTC_TIME.
+			/// </description>
+            /// <exception cref="MmsValueException">This exception is thrown if the value has the wrong type.</exception>
+            public void SetUtcTimeMs(ulong timeval)
+			{
+				if (GetType () == MmsType.MMS_UTC_TIME) {
+                    MmsValue_setUtcTimeMs(valueReference, timeval);
+				} else
+					throw new MmsValueException ("Value is not a time type");
+			}
+
             /// <summary>
             /// Gets the timestamp value as UTC time in ms.
             /// </summary>
@@ -616,6 +642,21 @@ namespace IEC61850
 					throw new MmsValueException ("Value type is not float");
 			}
 
+			/// <summary>
+			/// Sets the float value of an MMS_FLOAT instance
+			/// </summary>
+			/// <param name='value'>
+			/// the new value to set
+			/// </param>
+			/// <exception cref="MmsValueException">This exception is thrown if the value has the wrong type.</exception>
+			public void SetFloat (float value)
+			{
+			    if (GetType () == MmsType.MMS_FLOAT)
+			        MmsValue_setFloat (valueReference, value);
+			    else
+			        throw new MmsValueException ("Value type is not float");
+			}
+
             /// <summary>
             /// Gets the double value of an MMS_FLOAT instance
             /// </summary>
@@ -630,6 +671,21 @@ namespace IEC61850
 				else
 					throw new MmsValueException ("Value type is not float");
 			}
+						
+			/// <summary>
+			/// Sets the float/double value of an MMS_FLOAT instance
+			/// </summary>
+			/// <param name='value'>
+			/// the new value to set
+			/// </param>
+			/// <exception cref="MmsValueException">This exception is thrown if the value has the wrong type.</exception>
+			public void SetDouble (double value)
+			{
+				if (GetType () == MmsType.MMS_FLOAT)
+					MmsValue_setDouble (valueReference, value);
+				else
+					throw new MmsValueException ("Value type is not float");
+			}
 
             public override bool Equals (object obj)
             {
diff --git a/dotnet/tests/Test.cs b/dotnet/tests/Test.cs
index c5b03c02..ca1e4b6e 100644
--- a/dotnet/tests/Test.cs
+++ b/dotnet/tests/Test.cs
@@ -74,6 +74,35 @@ namespace tests
 			Assert.AreEqual(octetString, secondOctetString);
 		}
 
+		[Test ()]
+		public void MmsValueFloat() 
+		{
+			var val = new MmsValue ((float) 1234.5678);
+
+			Assert.AreEqual (val.ToFloat (), (float)1234.5678);
+
+			val.SetFloat ((float) 0.1234);
+
+			Assert.AreEqual (val.ToFloat (), (float) 0.1234);
+
+			Assert.AreEqual (val.ToDouble (), (double) 0.1234, (double) 0.0001);
+		}
+
+		[Test ()]
+		public void MmsValueDouble() 
+		{
+			var val = new MmsValue ((double) 1234.5678);
+
+			Assert.AreEqual (val.ToDouble (), (double)1234.5678);
+
+			val.SetDouble ((double) 0.1234);
+
+			Assert.AreEqual (val.ToDouble (), (double) 0.1234);
+
+			Assert.AreEqual (val.ToFloat (), (float)0.1234);
+		}
+
+
 	}
 }