Initial data commit

Task/Enforced-immutability/C-sharp/enforced-immutability-1.cs

@@ -0,0 +1 @@
+readonly DateTime now = DateTime.Now;

Task/Enforced-immutability/C-sharp/enforced-immutability-2.cs

@@ -0,0 +1 @@
+const int Max = 100;

Task/Enforced-immutability/C-sharp/enforced-immutability-3.cs

@@ -0,0 +1,3 @@
+public void Method(in int x) {
+    x = 5; //Compile error
+}

Task/Enforced-immutability/C-sharp/enforced-immutability-4.cs

@@ -0,0 +1,4 @@
+public void Method() {
+    const double sqrt5 = 2.236;
+    ...
+}

Task/Enforced-immutability/C-sharp/enforced-immutability-5.cs

@@ -0,0 +1 @@
+public string Key { get; }

Task/Enforced-immutability/C-sharp/enforced-immutability-6.cs

@@ -0,0 +1,7 @@
+public readonly struct Point
+{
+    public Point(int x, int y) => (X, Y) = (x, y);
+
+    public int X { get; }
+    public int Y { get; }
+}

Task/Enforced-immutability/C-sharp/enforced-immutability-7.cs

@@ -0,0 +1,4 @@
+public struct Vector
+{
+    public readonly int Length => 3;
+}