diff --git a/algorithms/math/BinaryToDecimal.cs b/algorithms/math/BinaryToDecimal.cs
new file mode 100644
index 0000000..4971606
--- /dev/null
+++ b/algorithms/math/BinaryToDecimal.cs
@@ -0,0 +1,30 @@
+using System;
+
+namespace BinaryToDecimal
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            BinaryToDecimal();
+            Console.ReadKey();
+        }
+
+        private static void BinaryToDecimal()
+        {
+            Console.Write("Please Enter the Binary Number:  ");
+            int ThebinaryNumber = int.Parse(Console.ReadLine());
+            int DecimalValueNumber = 0;
+            int Base1Number = 1;
+
+            while (ThebinaryNumber > 0)
+            {
+                int ReminderNumber = ThebinaryNumber % 10;
+                ThebinaryNumber = ThebinaryNumber / 10;
+                DecimalValueNumber += ReminderNumber * Base1Number;
+                Base1Number = Base1Number * 2;
+            }
+            Console.Write("Result of Decimal Value :  " + DecimalValueNumber);
+        }
+    }
+}
diff --git a/algorithms/math/DecimalToBinary.cs b/algorithms/math/DecimalToBinary.cs
new file mode 100644
index 0000000..4d1fa45
--- /dev/null
+++ b/algorithms/math/DecimalToBinary.cs
@@ -0,0 +1,34 @@
+using System;
+
+namespace DecimalToBinary
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+
+            DecimalToBinary();
+
+            Console.ReadKey();
+        }
+
+        private static void DecimalToBinary()
+        {
+            Console.Write("Please Enter a Decimal Number: ");
+
+            int inputDecimalNumber = Convert.ToInt32(Console.ReadLine());
+
+            string resultOfBinary;
+
+            resultOfBinary = string.Empty;
+            while (inputDecimalNumber > 1)
+            {
+                int remainder = inputDecimalNumber % 2;
+                resultOfBinary = Convert.ToString(remainder) + resultOfBinary;
+                inputDecimalNumber /= 2;
+            }
+            resultOfBinary = Convert.ToString(inputDecimalNumber) + resultOfBinary;
+            Console.WriteLine("Result In Binary Number: " + resultOfBinary);
+        }
+    }
+}